Event Notification Report for July 21, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/20/2015 - 07/21/2015
EVENT NUMBERS
512755124451245512465124951328
Non-Agreement State
Event Number: 51275
Rep Org: CHEVRON USA, INC
Licensee: CHEVRON USA, INC
Region: 4
City: Covington State: LA
County:
License #: 17-29267-01
Agreement: Y
Docket:
NRC Notified By: JAMES GRIMSLEY
HQ OPS Officer: DANIEL MILLS
Licensee: CHEVRON USA, INC
Region: 4
City: Covington State: LA
County:
License #: 17-29267-01
Agreement: Y
Docket:
NRC Notified By: JAMES GRIMSLEY
HQ OPS Officer: DANIEL MILLS
Notification Date: 07/29/2015
Notification Time: 20:14 [ET]
Event Date: 07/21/2015
Event Time: 00:00 [CDT]
Last Update Date: 09/02/2015
Notification Time: 20:14 [ET]
Event Date: 07/21/2015
Event Time: 00:00 [CDT]
Last Update Date: 09/02/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
30.50(b)(2) - SAFETY EQUIPMENT FAILURE
10 CFR Section:
30.50(b)(2) - SAFETY EQUIPMENT FAILURE
Person (Organization):
GREG WARNICK (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
GREG WARNICK (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
FIXED GAUGE SHUTTER STUCK IN THE OPEN POSITION
A fixed gauge shutter was determined to be stuck in the open position on 7/21/15. The device manufacturer was called and arrived on location on 7/24/15, and determined that the device "dip tube" is bent and the device will have to be removed for repair. The device is a Tracerco Profiler Series Fixed Density Profiler (Serial # 101020) with either 49 or 62 30mCi Am-241 sources (1470 mCi or 1860 mCi Am-241 aggregate). The device is located inside a process vessel on an offshore platform. Radiation measurements taken outside the process vessel indicate no detectable radiation. The have been no radiation exposures. The manufacturer will remove the device and repair it.
* * * UPDATE FROM RUSTY GRIMSLEY TO DANIEL MILLS AT 1852 EDT ON 7/30/15 * * *
The following was received from the licensee via email:
"In accordance with 10 CFR 30.50(b)(2), Chevron submitted a verbal notification to the NRC Operations Center at 2014 hrs. EDT on July 29, 2015. We [Chevron USA, Inc.] are submitting this written report to verify the information conveyed in the verbal report.
"Test separator MBD1010 on Chevron's Jack/St. Malo oil and gas production platform is equipped with a Tracerco Profiler Series Model T-240 fixed density profiler, serial number T240-FM-1-324. On July 21, 2015, it was discovered that this profiler's shutter was in the open position and would not close. Tracerco, the manufacturer of the device, was immediately notified. Tracerco inspected the profiler on July 24, 2015 and confirmed that the shutter would not close. Tracerco's initial investigation indicated that the density profiler source and detector tubes were bent, prohibiting the movement of the shutter.
"The Jack/St. Malo platform is located in Walker Ridge Block 718, OCS-G 32703, approximately 190 miles offshore Louisiana in the Outer Continental Shelf. The test separator is located on the Production Module lower deck. The shielded source housing and shutter mechanism are located on the Production Module mezzanine deck, which sits immediately above the separator.
"The profiler source tube contains 62 Americium 241 sources, 30 milliCuries per source, for a total of 1,860 milliCuries.
"Tracerco, the manufacturer of the profiler, is onsite and is developing a plan for disassembly and removal of the device from the separator using appropriate shielding and other protective measures to minimize potential exposures. If entry into the separator with the sources still in place is deemed necessary, Tracerco will implement appropriate radiation safety measures to minimize exposures. The device and sources will be stored in appropriate containers during shipment to Tracerco; turnover of the sources to Tracerco will be documented. As any repairs to the device or vessel entry would not constitute routine maintenance, Chevron personnel will not be involved in repairing or removing the profiler.
"There has been no exposure of platform personnel. Although the shutter remains in the open position, no one has entered the separator, and no radiation is detectable at the exterior of the separator. The separator is coated in insulation, covering the manways that provide access to the interior of the separator.
"Tracerco has been working on the Production Module mezzanine deck and has partially removed the profiler from the separator to assess its condition. Tracerco has established a barricade around the work area to prevent unauthorized access. Their monitoring indicates no exposures beyond five feet from the sources. Tracerco reports that the radiation detected appears to be lower than expected for fully unshielded sources. Tracerco has conducted wipe tests and has found no leakage from the sources."
Notified R4DO (Warnick) and NMSS Events Notification via email.
* * * UPDATE AT 1641 EDT ON 9/2/2015 FROM J. GRIMSLEY TO MARK ABRAMOVITZ * * *
The following report was received via e-mail:
"The incident investigation indicated a deflector plate inside the test separator became disconnected and struck the profiler. Under the supervision of Tracerco, entry was made into the vessel and the damaged profiler removed and returned to Tracerco's Pasadena, Texas facility for repairs. The deflector plate was reinstalled in the separator per manufacturer's specifications. The profiler was not re-installed.
"Tracerco reported the results of the wipe test taken at the time of the removal of the profiler showed no contamination."
Notified the R4DO (Warnick) and NMSS Events Resource (via e-mail).
A fixed gauge shutter was determined to be stuck in the open position on 7/21/15. The device manufacturer was called and arrived on location on 7/24/15, and determined that the device "dip tube" is bent and the device will have to be removed for repair. The device is a Tracerco Profiler Series Fixed Density Profiler (Serial # 101020) with either 49 or 62 30mCi Am-241 sources (1470 mCi or 1860 mCi Am-241 aggregate). The device is located inside a process vessel on an offshore platform. Radiation measurements taken outside the process vessel indicate no detectable radiation. The have been no radiation exposures. The manufacturer will remove the device and repair it.
* * * UPDATE FROM RUSTY GRIMSLEY TO DANIEL MILLS AT 1852 EDT ON 7/30/15 * * *
The following was received from the licensee via email:
"In accordance with 10 CFR 30.50(b)(2), Chevron submitted a verbal notification to the NRC Operations Center at 2014 hrs. EDT on July 29, 2015. We [Chevron USA, Inc.] are submitting this written report to verify the information conveyed in the verbal report.
"Test separator MBD1010 on Chevron's Jack/St. Malo oil and gas production platform is equipped with a Tracerco Profiler Series Model T-240 fixed density profiler, serial number T240-FM-1-324. On July 21, 2015, it was discovered that this profiler's shutter was in the open position and would not close. Tracerco, the manufacturer of the device, was immediately notified. Tracerco inspected the profiler on July 24, 2015 and confirmed that the shutter would not close. Tracerco's initial investigation indicated that the density profiler source and detector tubes were bent, prohibiting the movement of the shutter.
"The Jack/St. Malo platform is located in Walker Ridge Block 718, OCS-G 32703, approximately 190 miles offshore Louisiana in the Outer Continental Shelf. The test separator is located on the Production Module lower deck. The shielded source housing and shutter mechanism are located on the Production Module mezzanine deck, which sits immediately above the separator.
"The profiler source tube contains 62 Americium 241 sources, 30 milliCuries per source, for a total of 1,860 milliCuries.
"Tracerco, the manufacturer of the profiler, is onsite and is developing a plan for disassembly and removal of the device from the separator using appropriate shielding and other protective measures to minimize potential exposures. If entry into the separator with the sources still in place is deemed necessary, Tracerco will implement appropriate radiation safety measures to minimize exposures. The device and sources will be stored in appropriate containers during shipment to Tracerco; turnover of the sources to Tracerco will be documented. As any repairs to the device or vessel entry would not constitute routine maintenance, Chevron personnel will not be involved in repairing or removing the profiler.
"There has been no exposure of platform personnel. Although the shutter remains in the open position, no one has entered the separator, and no radiation is detectable at the exterior of the separator. The separator is coated in insulation, covering the manways that provide access to the interior of the separator.
"Tracerco has been working on the Production Module mezzanine deck and has partially removed the profiler from the separator to assess its condition. Tracerco has established a barricade around the work area to prevent unauthorized access. Their monitoring indicates no exposures beyond five feet from the sources. Tracerco reports that the radiation detected appears to be lower than expected for fully unshielded sources. Tracerco has conducted wipe tests and has found no leakage from the sources."
Notified R4DO (Warnick) and NMSS Events Notification via email.
* * * UPDATE AT 1641 EDT ON 9/2/2015 FROM J. GRIMSLEY TO MARK ABRAMOVITZ * * *
The following report was received via e-mail:
"The incident investigation indicated a deflector plate inside the test separator became disconnected and struck the profiler. Under the supervision of Tracerco, entry was made into the vessel and the damaged profiler removed and returned to Tracerco's Pasadena, Texas facility for repairs. The deflector plate was reinstalled in the separator per manufacturer's specifications. The profiler was not re-installed.
"Tracerco reported the results of the wipe test taken at the time of the removal of the profiler showed no contamination."
Notified the R4DO (Warnick) and NMSS Events Resource (via e-mail).
Power Reactor
Event Number: 51244
Facility: SURRY
Region: 2 State: VA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: BRET RICKERT
HQ OPS Officer: DANIEL MILLS
Region: 2 State: VA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: BRET RICKERT
HQ OPS Officer: DANIEL MILLS
Notification Date: 07/21/2015
Notification Time: 07:40 [ET]
Event Date: 07/21/2015
Event Time: 05:04 [EDT]
Last Update Date: 07/21/2015
Notification Time: 07:40 [ET]
Event Date: 07/21/2015
Event Time: 05:04 [EDT]
Last Update Date: 07/21/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
MICHAEL F. KING (R2DO)
SCOTT MORRIS (NRR)
JEFFERY GRANT (IRD)
MICHAEL F. KING (R2DO)
SCOTT MORRIS (NRR)
JEFFERY GRANT (IRD)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 5 | Power Operation | 0 | Hot Standby |
SURRY UNIT 2 TRIP DURING REACTOR STARTUP
"Unit 2 Reactor automatically tripped during Unit start up following a maintenance outage. The first indication of the reactor trip was the annunciator Reactor Trip by Turbine Trip. There were no complications following the trip and Unit 2 is stable at Hot Shut Down. Decay Heat Removal is being maintained by dumping steam to the Main Condenser. Steam Generator water level is being maintained by the Main Feedwater system.
"At the time of the Reactor Trip, Overspeed Protection Circuitry (OPC) Test was being performed on the Unit 2 Main Turbine. The SOV Turbine Trip annunciator was received. The cause of the reactor trip is under investigation.
"This notification is being made pursuant to 10 CFR 50.72(b)(2)(iv)(B) for 4-hour notification of Reactor Protection System activation. The Plant responded as expected for the trip. The NRC resident has been notified of the event.
"There was no radiation release due to this event, nor were there any personnel injuries or contamination events."
The licensee has notified the NRC Resident Inspector.
"Unit 2 Reactor automatically tripped during Unit start up following a maintenance outage. The first indication of the reactor trip was the annunciator Reactor Trip by Turbine Trip. There were no complications following the trip and Unit 2 is stable at Hot Shut Down. Decay Heat Removal is being maintained by dumping steam to the Main Condenser. Steam Generator water level is being maintained by the Main Feedwater system.
"At the time of the Reactor Trip, Overspeed Protection Circuitry (OPC) Test was being performed on the Unit 2 Main Turbine. The SOV Turbine Trip annunciator was received. The cause of the reactor trip is under investigation.
"This notification is being made pursuant to 10 CFR 50.72(b)(2)(iv)(B) for 4-hour notification of Reactor Protection System activation. The Plant responded as expected for the trip. The NRC resident has been notified of the event.
"There was no radiation release due to this event, nor were there any personnel injuries or contamination events."
The licensee has notified the NRC Resident Inspector.
Agreement State
Event Number: 51245
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: STERIGENICS US, LLC
Region: 4
City: HAYWARD State: CA
County:
License #: 6268-01
Agreement: Y
Docket:
NRC Notified By: KENT PENDERGAST
HQ OPS Officer: JOHN SHOEMAKER
Licensee: STERIGENICS US, LLC
Region: 4
City: HAYWARD State: CA
County:
License #: 6268-01
Agreement: Y
Docket:
NRC Notified By: KENT PENDERGAST
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 07/21/2015
Notification Time: 20:06 [ET]
Event Date: 07/21/2015
Event Time: 00:11 [PDT]
Last Update Date: 07/21/2015
Notification Time: 20:06 [ET]
Event Date: 07/21/2015
Event Time: 00:11 [PDT]
Last Update Date: 07/21/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
HEATHER GEPFORD (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
HEATHER GEPFORD (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
AGREEMENT STATE REPORT - SOURCE RACK PNEUMATIC CYLINDER FAILURE
The following report was received from the State of California via email:
"On 07/21/15, the Sterigenics Corporate RSO [Radiation Safety Officer] contacted [California - Radiologic Health Branch] RHB-Sacramento office, via an email and telephone, to report the following event in accordance with [10CFR]36.83(a)(4). [The licensee's] email stated the following:
"Last night, at approximately [0011] PDT, at the Sterigenics Hayward Facility (Radioactive materials License 6268-1), the pneumatic cylinder used to raise one of the two source racks (Hoist #1) failed to function as designed. The failure did not cause a stuck source, nor was there any risk of exposure to any individual as a result of this failure. The source did return to the down position in the pool as designed, however, the pneumatic cylinder experienced a failure and a broken flange and is not operable.
"[The licensee] will review, in detail, the cause of this failure and implement appropriate corrective action including any necessary changes in maintenance and equipment and report these changes to [the State of California] in writing, within 30 days, as required by 10CFR36.83(b).
"In the interim, the facility will not commence operations until repairs are completed to the hoist and approval to commence operations is granted by the Corporate RSO and Corporate Engineering.
"[The licensee RSO] further stated that there is no emergency or current issue. A corporate engineer will arrive in San Francisco by [1400 PDT] on 7/21/15, to work on the irradiator. The facility is staffed 24/7 and will notify RHB before resuming any operations.
"[California] RHB will be following up with the licensee."
The irradiator is in safe mode and the licensee will be investigating the reason for the failure.
The following report was received from the State of California via email:
"On 07/21/15, the Sterigenics Corporate RSO [Radiation Safety Officer] contacted [California - Radiologic Health Branch] RHB-Sacramento office, via an email and telephone, to report the following event in accordance with [10CFR]36.83(a)(4). [The licensee's] email stated the following:
"Last night, at approximately [0011] PDT, at the Sterigenics Hayward Facility (Radioactive materials License 6268-1), the pneumatic cylinder used to raise one of the two source racks (Hoist #1) failed to function as designed. The failure did not cause a stuck source, nor was there any risk of exposure to any individual as a result of this failure. The source did return to the down position in the pool as designed, however, the pneumatic cylinder experienced a failure and a broken flange and is not operable.
"[The licensee] will review, in detail, the cause of this failure and implement appropriate corrective action including any necessary changes in maintenance and equipment and report these changes to [the State of California] in writing, within 30 days, as required by 10CFR36.83(b).
"In the interim, the facility will not commence operations until repairs are completed to the hoist and approval to commence operations is granted by the Corporate RSO and Corporate Engineering.
"[The licensee RSO] further stated that there is no emergency or current issue. A corporate engineer will arrive in San Francisco by [1400 PDT] on 7/21/15, to work on the irradiator. The facility is staffed 24/7 and will notify RHB before resuming any operations.
"[California] RHB will be following up with the licensee."
The irradiator is in safe mode and the licensee will be investigating the reason for the failure.
Power Reactor
Event Number: 51246
Facility: DIABLO CANYON
Region: 4 State: CA
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: CRAIG HARVEY
HQ OPS Officer: JOHN SHOEMAKER
Region: 4 State: CA
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: CRAIG HARVEY
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 07/21/2015
Notification Time: 21:22 [ET]
Event Date: 07/21/2015
Event Time: 14:53 [PDT]
Last Update Date: 07/21/2015
Notification Time: 21:22 [ET]
Event Date: 07/21/2015
Event Time: 14:53 [PDT]
Last Update Date: 07/21/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
HEATHER GEPFORD (R4DO)
HEATHER GEPFORD (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
SINGLE EMERGENCY SIREN INADVERTENT ACTUATION
"On 7/21/2015, at approximately 1453 Pacific Daylight Time (PDT), while performing quiet testing of the early warning system, a Pacific Gas and Electric (PG&E) Telecommunications Technician identified that a single emergency response siren was making a full sound output when it should not have been. PG&E Technicians took action and deactivated the single siren. The siren sounded for approximately 1 minute. As a result, this issue is being reported under 10 CFR 50.72(b)(2)(xi) for notifications to other offsite government agencies as the licensee notified the County of San Luis Obispo of the siren deactivation. The San Luis Obispo County Sheriff Watch Commander has been notified of the need to implement alternate means of alert and notification for the areas affected by the deactivation of the single siren. This was accounted for in pre-planning efforts and neither the utility nor 911 received any calls [from the public] related to this matter. The source of the activation signal has not been determined and is being investigated.
"There was no impact to the health and safety of the public as a result of this event as the offsite response capabilities remain functional with a single siren failure. The site is operating normally with no emergency conditions present. The NRC Resident Inspector has been notified."
"On 7/21/2015, at approximately 1453 Pacific Daylight Time (PDT), while performing quiet testing of the early warning system, a Pacific Gas and Electric (PG&E) Telecommunications Technician identified that a single emergency response siren was making a full sound output when it should not have been. PG&E Technicians took action and deactivated the single siren. The siren sounded for approximately 1 minute. As a result, this issue is being reported under 10 CFR 50.72(b)(2)(xi) for notifications to other offsite government agencies as the licensee notified the County of San Luis Obispo of the siren deactivation. The San Luis Obispo County Sheriff Watch Commander has been notified of the need to implement alternate means of alert and notification for the areas affected by the deactivation of the single siren. This was accounted for in pre-planning efforts and neither the utility nor 911 received any calls [from the public] related to this matter. The source of the activation signal has not been determined and is being investigated.
"There was no impact to the health and safety of the public as a result of this event as the offsite response capabilities remain functional with a single siren failure. The site is operating normally with no emergency conditions present. The NRC Resident Inspector has been notified."
Agreement State
Event Number: 51249
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: TWINING, INC.
Region: 4
City: SACRAMENTO State: CA
County:
License #: 7782-34
Agreement: Y
Docket:
NRC Notified By: KENNETH FUREY
HQ OPS Officer: DONG HWA PARK
Licensee: TWINING, INC.
Region: 4
City: SACRAMENTO State: CA
County:
License #: 7782-34
Agreement: Y
Docket:
NRC Notified By: KENNETH FUREY
HQ OPS Officer: DONG HWA PARK
Notification Date: 07/22/2015
Notification Time: 11:21 [ET]
Event Date: 07/21/2015
Event Time: 00:00 [PDT]
Last Update Date: 07/22/2015
Notification Time: 11:21 [ET]
Event Date: 07/21/2015
Event Time: 00:00 [PDT]
Last Update Date: 07/22/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
HEATHER GEPFORD (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
HEATHER GEPFORD (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
AGREEMENT STATE REPORT - DAMAGED TROXLER
The following was received from the State of California via Email:
"A CPN thin layer density gauge, serial #1228, was run over by a dump truck that was spreading sand at a paving project on Highway 12 at Terminous Road in San Joaquin County, CA. The source was not breached and remained intact. The gauge was taken to Pacific Nuclear and a leak test disclosed no removable contamination. The California Code of Regulations, Title 17, Section 30350.3 states that the licensee shall immediately notify the Department by telephone and subsequently, within 30 days, by confirmation letter if the licensee knows or has reason to believe that a sealed source has been ruptured. This incident is being reported to the NRC as information only."
California 5010 number: 072115
The following was received from the State of California via Email:
"A CPN thin layer density gauge, serial #1228, was run over by a dump truck that was spreading sand at a paving project on Highway 12 at Terminous Road in San Joaquin County, CA. The source was not breached and remained intact. The gauge was taken to Pacific Nuclear and a leak test disclosed no removable contamination. The California Code of Regulations, Title 17, Section 30350.3 states that the licensee shall immediately notify the Department by telephone and subsequently, within 30 days, by confirmation letter if the licensee knows or has reason to believe that a sealed source has been ruptured. This incident is being reported to the NRC as information only."
California 5010 number: 072115
Agreement State
Event Number: 51328
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: STERIGENICS INTERNATIONAL, INC.
Region: 4
City: HAYWARD State: CA
County:
License #: 6268-01
Agreement: Y
Docket:
NRC Notified By: NIKA HEWADIKARAM
HQ OPS Officer: MARK ABRAMOVITZ
Licensee: STERIGENICS INTERNATIONAL, INC.
Region: 4
City: HAYWARD State: CA
County:
License #: 6268-01
Agreement: Y
Docket:
NRC Notified By: NIKA HEWADIKARAM
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 08/18/2015
Notification Time: 17:52 [ET]
Event Date: 07/21/2015
Event Time: 00:11 [PDT]
Last Update Date: 08/18/2015
Notification Time: 17:52 [ET]
Event Date: 07/21/2015
Event Time: 00:11 [PDT]
Last Update Date: 08/18/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
BOB HAGAR (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
BOB HAGAR (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
AGREEMENT STATE REPORT - IRRADIATOR SOURCE RACKS FAILED SAFE
The following report was received via e-mail:
" On 07/21/15, Sterigenics Corporate RSO [Radiation Safety Officer] contacted RHB-Sacramento office [California Radiation Health Branch] via an email and telephone to report the following event in accordance with 36.83(a)(4). His email stated the following:
"Last night [7/21/15] at approximately 12:11 AM PDT at the Sterigenics Hayward Facility (Radioactive materials License 6268-1), the pneumatic cylinder used to raise one of the two source racks (Hoist #1) failed to function as designed. The failure did NOT cause a 'stuck source' nor was there any risk of exposure to any individual as a result of this failure. The source did return to the 'down' position in the pool as designed, however, the pneumatic cylinder experienced a failure and a broken flange and is not operable.
"We [Sterigenics} will review in detail the cause of this failure and implement appropriate corrective action including any necessary changes in maintenance and equipment and report these changes to you [California] in writing within 30 days as required by 10CFR36.83 (b).
"In the interim, the facility will not commence operations until repairs are completed to the hoist and approval to commence operations is granted by the Corporate RSO and Corporate Engineering.
"[Sterigenics] further stated that there is no emergency or current issue. A corporate engineer will arrive in San Francisco by 2:00 on 7/21/15 to work on the irradiator. Facility is staffed 24/7 and will notify RHB before resuming any operations.
"[California] RHB will be following up with the licensee."
California Event 072115
The following report was received via e-mail:
" On 07/21/15, Sterigenics Corporate RSO [Radiation Safety Officer] contacted RHB-Sacramento office [California Radiation Health Branch] via an email and telephone to report the following event in accordance with 36.83(a)(4). His email stated the following:
"Last night [7/21/15] at approximately 12:11 AM PDT at the Sterigenics Hayward Facility (Radioactive materials License 6268-1), the pneumatic cylinder used to raise one of the two source racks (Hoist #1) failed to function as designed. The failure did NOT cause a 'stuck source' nor was there any risk of exposure to any individual as a result of this failure. The source did return to the 'down' position in the pool as designed, however, the pneumatic cylinder experienced a failure and a broken flange and is not operable.
"We [Sterigenics} will review in detail the cause of this failure and implement appropriate corrective action including any necessary changes in maintenance and equipment and report these changes to you [California] in writing within 30 days as required by 10CFR36.83 (b).
"In the interim, the facility will not commence operations until repairs are completed to the hoist and approval to commence operations is granted by the Corporate RSO and Corporate Engineering.
"[Sterigenics] further stated that there is no emergency or current issue. A corporate engineer will arrive in San Francisco by 2:00 on 7/21/15 to work on the irradiator. Facility is staffed 24/7 and will notify RHB before resuming any operations.
"[California] RHB will be following up with the licensee."
California Event 072115