User Tools
playground:alarms
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
playground:alarms [2016/05/04 09:06] jacobs [Shutdown Module: Located above beam current meters.] |
playground:alarms [2016/05/04 10:36] (current) jacobs [Tritium Monitor:] |
||
|---|---|---|---|
| Line 53: | Line 53: | ||
| There are two conditions which will cause the Radiation Monitor to send a shutdown request to the Shutdown Module. | There are two conditions which will cause the Radiation Monitor to send a shutdown request to the Shutdown Module. | ||
| - | The first is based on **instantaneous** rate. A rate greater than 100 mRem/hr on an unsecured detector will cause this type of shutdown. Once the operator has verified that no individual was exposed and the situation has been corrected, the operator may silence the shutdown alarm and resume operations. **The event shall be recorded on the shutdown log (form found in Testing, Calibration, and Shutdown book) and in the electronic log book.** | + | The first is based on **instantaneous** rate. A rate greater than 100 mRem/hr on an unsecured detector will cause this type of shutdown. |
| - | The second condition is based on **accumulated counts**. Reaching 200 counts (20 mrem) in an 8 hour cycle will cause this type of shutdown. Two persons are required to reset the Radiation Monitor from an accumulated dose shutdown, one has to press the T3 button in the rear, the other has to press the two buttons on the front. A full written explanation (form found in Testing, Calibration, and Shutdown book) shall be completed and added to the Health Physics Daily Log Book. **The event shall be recorded in the shutdown log and the electronic log book.** The Radiation Monitor shall never be reset unless there is absolute assurance that no personnel has received the dose registered on the digital counter. An investigation shall be made, documented, and action taken to prevent recurrence of this type of shutdown. | + | **Actions:** Once the operator has verified that no individual was exposed and the situation has been corrected, the operator may silence the shutdown alarm and resume operations. **The event shall be recorded on the "Accidental Shutdown Log" (form found in Testing, Calibration, and Shutdown book) and in the electronic log book.** |
| + | |||
| + | The second condition is based on **accumulated counts**. Reaching 200 counts (20 mrem) in an 8 hour cycle will cause this type of shutdown. | ||
| + | |||
| + | **Actions:** Two persons are required to reset the Radiation Monitor from an accumulated dose shutdown, one has to press the T3 button in the rear, the other has to press the two buttons on the front. A full written explanation shall be completed and added to the Health Physics Daily Log Book. **The event shall be recorded in the "Accidental Shutdown Log" (form found in Testing, Calibration, and Shutdown book) and the electronic log book.** The Radiation Monitor shall never be reset unless there is absolute assurance that no personnel has received the dose registered on the digital counter. An investigation shall be made, documented, and action taken to prevent recurrence of this type of shutdown. | ||
| Line 72: | Line 76: | ||
| The Compressed Air Main Receiver Pressure is the pressure in a storage tank that periodically gets refilled by the main compressor. This pressure should always be in the green zone on the dial, or slightly above. This pressure is also recorded by the electronic data logging system and cycles up and down as the compressor runs. The line pressure is regulated to 90 psi after the Main Receiver and is the air pressure in the building. A line pressure below 90 psi will cause an E2 alarm. The Main Loop Temp meter is the temperature of the main chilled water loop coming from the chiller on the roof. This temperature is recorded by the electronic data logging system and cycles up and down as the chiller runs. If this temperature gets too high the E2 alarm will activate. The Sub Loop Temp warning light will activate and cause an E2 alarm if the temperature of any of the 4 sub loops (the pumps in the Vault) becomes too hot. The red light in the middle of Panel E2 will light when any one of the alarm conditions exists. It is up to the operator to determine which of the conditions is outside of normal parameters. | The Compressed Air Main Receiver Pressure is the pressure in a storage tank that periodically gets refilled by the main compressor. This pressure should always be in the green zone on the dial, or slightly above. This pressure is also recorded by the electronic data logging system and cycles up and down as the compressor runs. The line pressure is regulated to 90 psi after the Main Receiver and is the air pressure in the building. A line pressure below 90 psi will cause an E2 alarm. The Main Loop Temp meter is the temperature of the main chilled water loop coming from the chiller on the roof. This temperature is recorded by the electronic data logging system and cycles up and down as the chiller runs. If this temperature gets too high the E2 alarm will activate. The Sub Loop Temp warning light will activate and cause an E2 alarm if the temperature of any of the 4 sub loops (the pumps in the Vault) becomes too hot. The red light in the middle of Panel E2 will light when any one of the alarm conditions exists. It is up to the operator to determine which of the conditions is outside of normal parameters. | ||
| - | Panel E1 monitors less critical conditions and provides the audible alarm for both Panels E1 and E2. A row of red lights across the panel indicate which alarm is active by blinking the red light for that alarm and sounding the audible alarm. The audible alarm is a rapidly oscillating high-low tone. The audible alarm may be silenced by pressing the “ACK” button to acknowledge the alarm. If the alarm condition is still present, the red light for that alarm will become steadily lit after the ACK button is pushed. If the alarm condition was brief and is no longer present, the red light for that alarm will go out when the ACK button is pushed. Because of this, the operator must note which alarm light(s) was flashing prior to pressing the ACK button. The E1 alarms are as follows: | + | Panel E1 monitors less critical conditions and provides the audible alarm for both Panels E1 and E2. A row of red lights across the panel indicate which alarm is active by blinking the red light for that alarm and sounding the audible alarm. The audible alarm is a rapidly oscillating high-low tone. The audible alarm may be silenced by pressing the “ACK” button to acknowledge the alarm. If the alarm condition is still present, the red light for that alarm will become steadily lit after the ACK button is pushed. If the alarm condition was brief and is no longer present, the red light for that alarm will go out when the ACK button is pushed. |
| - | * 1) Water Hot or Air Low. This alarm activates when Panel E2 detects an alarm condition. If E2 is in “Connect” mode the accelerator will shut down. The operator should turn down all magnets and contact a staff member. If, for some reason, the accelerator does not shut down, the operator should also turn off the accelerator in the normal fashion. | + | |
| - | * 2) Source Cooling Water Low. The sources are cooled by an independent water loop circulating high resistivity de-ionized water. If the water in the loop gets below a certain level the alarm will sound even though water is still circulating. This alarm tends to go on and off repeatedly when the water is right at the alarm level. Make a logbook entry and contact staff the make arrangements for adding water to the loop. | + | **Actions:** The operator must note which alarm light(s) was flashing prior to pressing the ACK button. The E1 alarms are as follows: |
| - | * 3) High Water In Pit. The pit below the accelerator is the lowest point in the building and water collects there. The water is normally removed by a sump pump. If this pump fails the pit will fill with water. When this alarm is active the operator must go to the Vault and look down in the pit for the presence of water. If water is present contact staff immediately. If no water is present make a logbook entry and contact staff so that the alarm may be reset at first opportunity. | + | * 1) Water Hot or Air Low. This alarm activates when Panel E2 detects an alarm condition. If E2 is in “Connect” mode the accelerator will shut down. **The operator must turn down all magnets and contact a staff member. If, for some reason, the accelerator does not shut down, the operator should also turn off the accelerator in the normal fashion.** |
| + | * 2) Source Cooling Water Low. The sources are cooled by an independent water loop circulating high resistivity de-ionized water. If the water in the loop gets below a certain level the alarm will sound even though water is still circulating. This alarm tends to go on and off repeatedly when the water is right at the alarm level. **Make a logbook entry and contact staff the make arrangements for adding water to the loop.** | ||
| + | * 3) High Water In Pit. The pit below the accelerator is the lowest point in the building and water collects there. The water is normally removed by a sump pump. If this pump fails the pit will fill with water. **When this alarm is active the operator must go to the Vault and look down in the pit for the presence of water. If water is present contact staff immediately. If no water is present make a logbook entry and contact staff so that the alarm may be reset at first opportunity.** | ||
| * 4) Dock Doorbell. Self explanatory. | * 4) Dock Doorbell. Self explanatory. | ||
| - | * 5) Sputter Source Low Flow. There is a flow switch on the water loop cooling the sputter source. This alarm will activate if the water flow becomes too low or stops. If this alarm activates begin to shut down the source and contact staff. If this alarm activates in conjunction with the Source Cooling Water Low alarm there is likely a water leak in the source area - shutdown both sources and contact staff immediately. | + | * 5) Sputter Source Low Flow. There is a flow switch on the water loop cooling the sputter source. This alarm will activate if the water flow becomes too low or stops. **If this alarm activates begin to shut down the source and contact staff. If this alarm activates in conjunction with the Source Cooling Water Low alarm there is likely a water leak in the source area - shutdown both sources and contact staff immediately.** |
| * 6) Swinger Solder Link. There is a switch on the swinger that will activate when a gas cell fails and cause this alarm. When a gas cell is not in use this switch must be set so as not to be in the alarm position. This alarm will also cause the swinger gate valve to close and prevent the gate valve from opening as long as the alarm condition is true. | * 6) Swinger Solder Link. There is a switch on the swinger that will activate when a gas cell fails and cause this alarm. When a gas cell is not in use this switch must be set so as not to be in the alarm position. This alarm will also cause the swinger gate valve to close and prevent the gate valve from opening as long as the alarm condition is true. | ||
| - | * 7) Phase Failure Detected. This alarm will activate if any one of the electrical phases serving the building is interrupted for half a second or longer. The operator will need to execute the brief or extended power outage procedures as the case may be. | + | * 7) Phase Failure Detected. This alarm will activate if any one of the electrical phases serving the building is interrupted for half a second or longer. **The operator will need to execute the brief or extended power outage procedures as the case may be.** |
| - | * 8) Chain Stretch. This alarm will activate when the Pelletron chains have stretched to the point that motor assemblies are about ¼ inch from bottoming out on the column base plate. When this alarm sounds the operator needs to make an electronic logbook entry and email it to everyone so that a tank entry may be scheduled soon to shorten the chains. This alarm will definitely happen at accelerator startup. It is not clear whether this alarm will go out or stay on once the chains are running at full speed. | + | * 8) Chain Stretch. This alarm will activate when the Pelletron chains have stretched to the point that motor assemblies are about ¼ inch from bottoming out on the column base plate. **When this alarm sounds the operator needs to make an electronic logbook entry and email it to everyone so that a tank entry may be scheduled soon to shorten the chains.** This alarm will definitely happen at accelerator startup. It is not clear whether this alarm will go out or stay on once the chains are running at full speed. |
| * 9)And (10): For temporary use. Connected to the BNC connectors on the console patch panel labeled E1 alarm 9, 10. Contact closure will activate the alarm. | * 9)And (10): For temporary use. Connected to the BNC connectors on the console patch panel labeled E1 alarm 9, 10. Contact closure will activate the alarm. | ||
| + | |||
| Line 92: | Line 99: | ||
| - | This unit controls the chain drive motors and upcharge power supplies. It is normally energized as indicated by the red Power On light on the front door. A shutdown command from the Shutdown Module will cause this unit to go into a power off mode, disabling the chain drive motors and upcharge power supplies. __//This unit also goes into the power off mode when either or both of the tube vacuums goes bad, or one of the Emergency Off buttons in the lab has been pushed.//__ **//Bad vacuum and Emergency Off events do not cause any type of alarm to activate.//** The operator will have to press the "ON" button to re-energize the unit after a shutdown command, bad vacuum event, or Emergency Off event has been cleared and corrected. When this unit is off, the green ”Interlocks OK” light on the charging controller will not be illuminated in the control room, accelerator control power will be off, and all electrostatic common beam line components will be de-energized. | + | This unit controls the chain drive motors and upcharge power supplies. It also provides control power to all the electrostatic devices on the control console. It is normally energized as indicated by the red Power On light on the front door. A shutdown command from the Shutdown Module will cause this unit to go into a power off mode, disabling the chain drive motors and upcharge power supplies. __//This unit also goes into the power off mode when either or both of the tube vacuums goes bad, or one of the Emergency Off buttons in the lab has been pushed.//__ **//Bad vacuum and Emergency Off events do not cause any type of alarm to activate.//** When this unit is off, the green ”Interlocks OK” light on the charging controller will not be illuminated in the control room, accelerator control power will be off, and all electrostatic common beam line components will be de-energized. |
| + | |||
| + | **Actions:** | ||
| + | * **Reconfigure the TPS and CHARGING CONTROLS as directed in the Accelerator Shutdown procedure.** | ||
| + | *The operator will have to press the "ON" button to re-energize the unit **only after a shutdown command, bad vacuum event, or Emergency Off event has been cleared and corrected.** See the appropriate instructions to clear the condition. | ||
| + | *Be aware that the Beam Warning system may activate when power is restored. | ||
| ====== Emergency Off Button (EMO) Reset: ====== | ====== Emergency Off Button (EMO) Reset: ====== | ||
| {{playground:im003639.jpg|}} | {{playground:im003639.jpg|}} | ||
| + | {{playground:emopanel3.jpg|}} | ||
| - | - Identify which EMO was pushed and investigate the situation that led to the Emergency Stop event. | + | **Actions:** |
| + | - Identify which EMO was pushed (see the Emergency Off Annunciator Panel) and investigate the situation that led to the Emergency Stop event. | ||
| - Follow Section VIII of the Radiation Safety Handbook if there was any possibility of exposure. | - Follow Section VIII of the Radiation Safety Handbook if there was any possibility of exposure. | ||
| - Otherwise, provide a detailed written account of the event in the Electronic Logbook. Describe who was involved, which button was pushed, why it was pushed, and describe the course of events thast led to the Emergency Stop. | - Otherwise, provide a detailed written account of the event in the Electronic Logbook. Describe who was involved, which button was pushed, why it was pushed, and describe the course of events thast led to the Emergency Stop. | ||
| - | - Reconfigue the TPS and CHARGING CONTROLS as directed in the Accelerator Shutdown procedure. | + | - Reconfigure the TPS and CHARGING CONTROLS as directed in the Accelerator Shutdown procedure. |
| - Reset the activated EMO. Turn the red knob in the direction indicated by the arrows. The knob will pop outwards when it releases. | - Reset the activated EMO. Turn the red knob in the direction indicated by the arrows. The knob will pop outwards when it releases. | ||
| - Go to the Vault and reset the Pelletron AC Power Center. You may hear faraday cups operate when you do this. | - Go to the Vault and reset the Pelletron AC Power Center. You may hear faraday cups operate when you do this. | ||
| - Go to the Control Room and place all faraday cups in the "IN" position. | - Go to the Control Room and place all faraday cups in the "IN" position. | ||
| - Follow the Accelerator Startup Procedure and resume operations. | - Follow the Accelerator Startup Procedure and resume operations. | ||
| - | |||
| Line 120: | Line 133: | ||
| A "HIGH RAD MODE" switch is located on the Faraday Cup Control Module. When this switch is in the "OFF" position the LE cup will lift instantaneously and the audible and visual warning will be active for 15 seconds. When this switch is in the "ON" position there will be a 15 second delay between pushing the LE Cup "OUT" button and the actual lifting of the LE Cup, as well as the 15 second audible/visual warning. | A "HIGH RAD MODE" switch is located on the Faraday Cup Control Module. When this switch is in the "OFF" position the LE cup will lift instantaneously and the audible and visual warning will be active for 15 seconds. When this switch is in the "ON" position there will be a 15 second delay between pushing the LE Cup "OUT" button and the actual lifting of the LE Cup, as well as the 15 second audible/visual warning. | ||
| - | The Operator shall place the HIGH RAD MODE switch in the "ON" position when: | + | **The Operator shall place the HIGH RAD MODE switch in the "ON" position when:** |
| * The experiment conditions are known to produce measurable radiation | * The experiment conditions are known to produce measurable radiation | ||
| Line 126: | Line 139: | ||
| * Any time there is uncertainty in the radiation that will result from the experiment conditions | * Any time there is uncertainty in the radiation that will result from the experiment conditions | ||
| - | The Operator may place the HIGH RAD MODE switch in the "OFF" position when: | + | **The Operator may place the HIGH RAD MODE switch in the "OFF" position when:** |
| * The experiment conditions are known to NOT produce measurable radiation | * The experiment conditions are known to NOT produce measurable radiation | ||
| Line 157: | Line 170: | ||
| The Tritium monitor is normally left on the x1 scale with the alarm level set at the maximum of the range (~10 microcuries/meters3). The maximum allowable level is 20 microcuries/meters3. | The Tritium monitor is normally left on the x1 scale with the alarm level set at the maximum of the range (~10 microcuries/meters3). The maximum allowable level is 20 microcuries/meters3. | ||
| - | **If the Tritium monitor is alarming:** | + | **Actions if the Tritium monitor is alarming:** |
| ////-Check that there is air flow through the ion chamber. The Tritium Monitor will alarm if the pump is not on//// | ////-Check that there is air flow through the ion chamber. The Tritium Monitor will alarm if the pump is not on//// | ||
playground/alarms.1462367215.txt.gz · Last modified: 2016/05/04 09:06 by jacobs
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 3.0 Unported
