The condition reported by this Licensee Event Report (LER) was an expected condition as a result of planned activities in support of a routine refueling outage. As described in the LER, the Nuclear Regulatory Commission (NRC) has provided enforcement guidance, applicable to boiling water reactors, that allows the reported condition. Although this allowance is provided by the NRC's enforcement guidance, this condition is considered reportable in accordance with 10 CFR 50.73(a)(2)(i)(B) as a condition prohibited by Technical Specifications.
Between May 16, 2017 and June 15, 2017, Energy Northwest performed operations with the potential for draining the reactor vessel ( OPDRV) activities while in Mode 5 without an operable secondary containment. Although this was an expected condition, and is allowed by Enforcement Guidance Memorandum 11-003, Revision 3, these activities resulted in a condition prohibited by Technical Specification 3.6.4.1. The OPDRV activities were planned and completed under the guidance of plant procedures and work instructions, and are considered to have low safety significance based on the interim actions taken. Since this condition was an expected result of these actions, cause determination is not necessary. Energy Northwest will submit a license amendment request to adopt Technical Specification Task Force Traveler 542 associated with generic resolution of this issue. |
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Category:Letter
MONTHYEARGO2-24-004, License Amendment Request to Revise Emergency Plan2024-01-30030 January 2024 License Amendment Request to Revise Emergency Plan IR 05000397/20230042024-01-29029 January 2024 Integrated Inspection and Independent Spent Fuel Storage Installation Report 05000397/2023004 and 07200035/2023001 GO2-24-003, Relief Requests for the Columbia Generating Station Fifth Ten-Year Interval Inservice Testing2024-01-29029 January 2024 Relief Requests for the Columbia Generating Station Fifth Ten-Year Interval Inservice Testing ML24011A1522024-01-10010 January 2024 March 2024 Emergency Preparedness Exercise Inspection-Request for Information GO2-24-005, Docket No. 50-397 Supplement to Reply to a Notice of Violation; EA-21-1702024-01-0808 January 2024 Docket No. 50-397 Supplement to Reply to a Notice of Violation; EA-21-170 GO2-23-136, Guarantee of Payment of Deferred Premium2023-12-20020 December 2023 Guarantee of Payment of Deferred Premium GO2-23-135, Notice of Readiness for Supplemental Inspection2023-12-14014 December 2023 Notice of Readiness for Supplemental Inspection GO2-23-130, Reply to a Notice of Violation; EA-23-0542023-12-14014 December 2023 Reply to a Notice of Violation; EA-23-054 GO2-23-105, Licensing Basis Document Update and Biennial Commitment Change Report2023-12-12012 December 2023 Licensing Basis Document Update and Biennial Commitment Change Report ML23288A0002023-12-0707 December 2023 Issuance of Amendment No. 272 to Adopt TSTF-541, Revision 2, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position GO2-23-107, Application to Revise Technical Specifications to Adopt TSTS-584, Eliminate Automatic RWCU System Isolation on SLC Initiation2023-12-0505 December 2023 Application to Revise Technical Specifications to Adopt TSTS-584, Eliminate Automatic RWCU System Isolation on SLC Initiation GO2-23-126, Docket No. 50-397 Voluntary Response to Regulatory Issue Summary 2023-012023-11-28028 November 2023 Docket No. 50-397 Voluntary Response to Regulatory Issue Summary 2023-01 GO2-23-121, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-11-27027 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation IR 05000397/20230122023-11-20020 November 2023 Commercial Grade Dedication Inspection Report 05000397/2023012 ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV IR 05000397/20230102023-11-0909 November 2023 Biennial Problem Identification and Resolution Inspection Report 05000397/2023010 IR 05000397/20230932023-11-0101 November 2023 Final Significance Determination of a White Finding, Notice of Violation and Follow-Up Assessment Letter; NRC Inspection Report 05000397/2023093 ML23299A2072023-10-26026 October 2023 Biennial Requalification Inspection Request for Information IR 05000397/20230032023-10-25025 October 2023 Integrated Inspection Report 05000397/2023003 IR 05000397/20230112023-10-0404 October 2023 License Renewal Phase 2 Report 05000397/2023011 IR 05000397/20234012023-09-11011 September 2023 Security Baseline Inspection Report 05000397/2023401 GO2-23-097, In-Service Inspection Summary Report for the Twenty-Sixth Refueling Outage (R26)2023-09-0606 September 2023 In-Service Inspection Summary Report for the Twenty-Sixth Refueling Outage (R26) ML24032A2182023-09-0101 September 2023 Information Request, Security IR 2024401 GO2-23-100, Technical Specification Section 5.6.4 Post Accident Monitoring Instrumentation 14-Day Report for Inoperable Suppression Pool Level Indication2023-08-31031 August 2023 Technical Specification Section 5.6.4 Post Accident Monitoring Instrumentation 14-Day Report for Inoperable Suppression Pool Level Indication GO2-23-056, Application to Revise Technical Specifications to Adopt TSTF-230, Add New Condition B to LCO 3.6.2.3, RHR Suppression Pool Cooling2023-08-29029 August 2023 Application to Revise Technical Specifications to Adopt TSTF-230, Add New Condition B to LCO 3.6.2.3, RHR Suppression Pool Cooling IR 05000397/20230052023-08-22022 August 2023 Updated Inspection Plan for Columbia Generating Station (Report 05000397/2023005) - Mid Year Letter IR 05000397/20230022023-08-0101 August 2023 Integrated Inspection Report 05000397/2023002 GO2-23-093, Supplement to Reply to a Notice of Violation: EA-21-1702023-07-27027 July 2023 Supplement to Reply to a Notice of Violation: EA-21-170 ML23206A2442023-07-25025 July 2023 Energy Northwest Columbia Generating Station, Response to Apparent Violation in NRC Inspection Report 05000397/2023092; EA-23-054 GO2-23-068, Notification of Completion of Commitments Required Prior to Entry Into the Period of Extended Operation2023-07-19019 July 2023 Notification of Completion of Commitments Required Prior to Entry Into the Period of Extended Operation GO2-23-090, Reply to a Notice of Violation2023-07-12012 July 2023 Reply to a Notice of Violation ML23143A1202023-06-27027 June 2023 Request Number 4ISI-11 to the American Society of Mechanical Engineers Boiler and Pressure Vessel Code Regarding Alternate Examination of Reactor Vessel Welds GO2-23-073, Notification of NPDES Permit Issuance2023-06-26026 June 2023 Notification of NPDES Permit Issuance ML23163A2502023-06-12012 June 2023 Summary of Changes and Analysis for Revision 41 of Plant Procedures Manual 13.8.1 Emergency Dose Projection System Operations GO2-23-072, Cycle 27 Core Operating Limits Report2023-06-0505 June 2023 Cycle 27 Core Operating Limits Report ML23157A2702023-06-0101 June 2023 4-2022-011 -022 Letter - OI Closure to Licensee IR 05000397/20230922023-06-0101 June 2023 NRC Inspection Report 05000397/2023092 and Preliminary White Finding IR 05000397/20230902023-06-0101 June 2023 Final Significance Determination of a White Finding, Notice of Violation and Follow-Up Assessment Letter; NRC Inspection Report 05000397/2023090 GO2-23-055, Independent Spent Fuel Storage Installation, 2022 Annual Radiological Environmental Operating Report2023-05-15015 May 2023 Independent Spent Fuel Storage Installation, 2022 Annual Radiological Environmental Operating Report IR 05000397/20230012023-05-0505 May 2023 Integrated Inspection Report 05000397/2023001 - April 26, 2023 GO2-23-006, License Amendment Request to Clean-Up Operating License and Appendix a Technical Specifications2023-05-0101 May 2023 License Amendment Request to Clean-Up Operating License and Appendix a Technical Specifications IR 05000397/20233012023-05-0101 May 2023 NRC Examination Report 05000397/2023301 GO2-23-053, 2022 Annual Environmental Operating Report2023-04-26026 April 2023 2022 Annual Environmental Operating Report GO2-23-057, 2022 Annual Radioactive Effluent Release Report2023-04-25025 April 2023 2022 Annual Radioactive Effluent Release Report ML23110A2642023-04-20020 April 2023 Request for Information License Renewal Phase 2 Inspection GO2-23-012, Application to Revise Technical Specifications to Adopt Tstf-541, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position2023-03-27027 March 2023 Application to Revise Technical Specifications to Adopt Tstf-541, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position GO2-23-041, Generation Station - Level of Financial Protection - Annual Reporting Requirement2023-03-15015 March 2023 Generation Station - Level of Financial Protection - Annual Reporting Requirement GO2-23-038, Plant Decommissioning Fund Status Report2023-03-15015 March 2023 Plant Decommissioning Fund Status Report ML23013A0812023-03-15015 March 2023 Issuance of Amendment No. 270 Revision to Technical Specifications to Adopt TSTF 505, Revision 2, Provide Risk-Informed Extended Completion Times-RITSTF Initiative 4B GO2-23-034, Report of Changes or Errors in Emergency Core Cooling System Loss of Coolant Accident Analysis Models Pursuant to 10 CFR 50.462023-03-13013 March 2023 Report of Changes or Errors in Emergency Core Cooling System Loss of Coolant Accident Analysis Models Pursuant to 10 CFR 50.46 2024-01-08
[Table view] Category:Licensee Event Report (LER)
MONTHYEAR05000397/LER-2017-0072017-11-30030 November 2017 Valve Closure Results in Momentary Increase in Secondary Containment Pressure, LER 17-007-00 for Columbia Generating Station Regarding Valve Closure Results in Momentary Increase in Secondary Containment Pressure 05000397/LER-2017-0062017-11-0909 November 2017 CONDITION PROHIBITED BY TECHNICAL SPECIFICATIONS DUE TO INCOMPLETE ACTION STATEMENT, LER 17-006-00 for Columbia Generating Station for Condition Prohibited by Technical Specifications Due to Incomplete Action Statement 05000397/LER-2017-0052017-11-0909 November 2017 Valve Closure Results in Momentary Increase in Secondary Containment Pressure, LER 17-005-00 for Columbia Generating Station Regarding Valve Closure Results in Momentary Increase in Secondary Containment Pressure 05000397/LER-2017-0042017-10-18018 October 2017 MANUAL REACTOR SCRAM DUE TO HIGH MAIN CONDENSER BACK PRESSURE, LER 17-004-00 for Columbia Generating Station Regarding Manual Reactor Scram Due to High Main Condenser Back Pressure 05000397/LER-2016-0022017-09-27027 September 2017 1 OF 3, LER 16-002-01 for Columbia Generating Station Regarding Valve Closure Results in Momentary Increase in Secondary Containment Pressure 05000397/LER-2016-0032017-08-29029 August 2017 Failure of Fan to Start Results in Momentary Increase in Secondary Containment Pressure, LER 16-003-01 for Columbia Regarding Failure of Fan to Start Results in Momentary Increase in Secondary Containment Pressure 05000397/LER-2017-0032017-08-24024 August 2017 Momentary loss of Secondary Containment due to Weather, LER 17-003-00 for Columbia Generating Station Regarding Momentary Loss of Secondary Containment due to Weather 05000397/LER-2017-0022017-07-10010 July 2017 Implementation of Enforcement Guidance Memorandum 11-003, Revision 3, LER 17-002-00 for Columbia Generating Station re Implementation of Enforcement Guidance Memorandum 11-003, Revision 3 05000397/LER-2016-0042017-06-0808 June 2017 1 OF 3, LER 16-004-01 for Columbia Generating Station Regarding Automatic Scram Due to Off-site Load Reject 05000397/LER-2017-0012017-03-20020 March 2017 Contactor Coil Failure Results in Tripping of HPCS Diesel Mixed Air Fan, LER 17-001-00 for Columbia Generating Station Regarding Contactor Coil Failure Results in Tripping of HPCS Diesel Mixed Air Fan 05000397/LER-2016-0052017-02-15015 February 2017 Leak in Minimum Flow Line Makes HPCS and Primary Containment Inoperable, LER 16-005-00 for Columbia Generating Station Regarding Leak in Minimum Flow Line Makes HPCS and Primary Containment Inoperable 05000397/LER-2016-0012016-05-24024 May 2016 MANUAL REACTOR SCRAM FOLLOWING LOSS OF REACTOR CLOSED COOLING, LER 16-001-00 for Columbia Regarding Manual Reactor Scram Following Loss of Reactor Closed Cooling 05000397/LER-2015-0072016-01-0707 January 2016 REACTOR BUILDING PRESSURE GREATER THAN TECHNICAL SPECIFICATIONS REQUIREMENT, LER 15-007-00 for Columbia Regarding Reactor Building Pressure Greater Than Technical Specifications Requirement 2017-09-27
[Table view] |
comments regarding burden estimate to the FOiA, Privacy and information Collections Branch cr-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to. the information collection.
05000- Columbia Generating Station 397
PLANT CONDITIONS
At the time of the event, the plant was in a scheduled refueling outage in Mode 5 with the reactor head de-tensioned.
EVENT DESCRIPTION
From May 16, 2017 to June 15, 2017, during a scheduled refueling outage, planned operations with the potential to drain the reactor vessel (OPDRV) activities were performed without secondary containment operable while the plant was operating in Mode 5, contrary to the requirements of Technical Specification (TS) 3.6.4.1. Energy Northwest met the provisions of Enforcement Guidance Memorandum (EGM) 11-003, Revision 3, to perform these activities. The event timeline for the planned activities is as follows:
5/16/17 2137 Pacific Daylight Time (PDT) — Commenced OPDRV window to support placing Residual Heat Removal System B (RHR-B) in Fuel Pool Cooling (FPC) assist mode.
5/16/17 2250 PDT — Commenced OPDRV for operating FPC and Cleanup System in the alternate assist mode when RHR Shutdown Cooling is not available.
5/17/17 0325 PDT — Exited OPDRV window.
5/20/17 0402 PDT — Commenced OPDRV window to support Control Rod Drive replacement.
5/21/17 0924 PDT — Exited OPDRV window.
5/29/17 0244 PDT — Commenced OPDRV window to support Reactor Recirculation System seal replacement.
5/30/17 0000 PDT — Commenced OPDRV activity to restore from operating FPC and Cleanup System in the alternate assist mode when RHR Shutdown Cooling is not available. Placed RHR-A in Shutdown Cooling.
5/31/17 1106 PDT — Exited OPDRV window.
6/1/17 0241 PDT — Commenced OPDRV window to support RHR valve re-seating.
6/1/17 0354 PDT — Exited OPDRV window.
6/8/17 1515 PDT — Commenced OPDRV window to perform the functional verification of Scram Discharge Volume instrumentation.
6/10/17 1430 PDT — Commenced OPDRV window in support of the Reactor Water Clean-Up system fill.
6/11/17 0103 PDT — Suspended OPDRV window to support the function test of the Balance of Plant Isolation Logic.
6/11/17 0227 PDT — Commenced OPDRV window in support of draining the reactor cavity.
6/11/17 0428 PDT — Exited OPDRV window.
comments regarding burden estimate to the FOIA, Privacy and Information Collections Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
05000- NUMBER NO.
002 00 Columbia Generating Station 397 2017 - - EVENT DESCRIPTION continued 6/12/17 0435 PDT — Commenced OPDRV window to support the Reactor Pressure Vessel leakage test.
6/15/17 1017 PDT — Exited OPDRV window.
REPORTABILITY AND SAFETY ASSESSMENT
This event is reportable in accordance with 10 CFR 50.73(a)(2)(i)(B) as an operation or condition prohibited by TS 3.6.4.1, which prohibits performing activities identified as OPDRVs in Mode 5 while secondary containment is inoperable.
The OPDRV activities described in this report were accomplished using the interim actions provided by EGM 11-003, Revision 3. In accordance with station procedures, Energy Northwest adhered to the Nuclear Regulatory Commission plain language definition of OPDRV activities that could potentially result in draining or siphoning the reactor pressure vessel water below the top of the fuel. During all OPDRV activities, the following prerequisites were met:
1. The plant was in Mode 5 with the reactor cavity water level was maintained greater than or equal to 22 feet above the Reactor Pressure Vessel (RPV) flange.
2. Two independent means of monitoring RPV water level were available.
3. At least one Emergency Core Cooling System pump was available and capable of injecting water equal to or greater than the maximum potential leakage rate from the RPV for a minimum of four hours.
4. The size of the allowable draining path was minimized to maintain drain down time to greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
5. Movement of recently irradiated fuel was prohibited.
6. OPDRV activities were prohibited during Mode 4 with secondary containment inoperable.
7. The capability to isolate a potential leakage path during OPDRV activities before the water inventory could reach the RPV flange was maintained.
The required compensatory measures were properly implemented and adequate levels of safety were provided during the performance of the OPDRV activities described in this report. Based on this information, the performance of these OPDRV activities was determined to have very low safety significance.
CAUSE OF EVENT
Implementation of EGM 11-003, Revision 3, interim actions during Columbia's Refueling Outage R23 was a planned activity. As such, no cause determination was performed on this condition.
SIMILAR EVENTS
On July 7, 2015, Energy Northwest submitted LER 2015-003-00 to report a similar occurrence. During Columbia's Refueling Outage R22, EGM 11-003, Revision 2, was utilized for OPDRV activities while secondary containment was inoperable.
FURTHER CORRECTIVE ACTIONS
Consistent with the guidance provided in EGM 11-003, Revision 3, Energy Northwest will submit a license amendment request to adopt Technical Specification Task Force Traveler 542, Reactor Pressure Vessel Water Inventory Control, associated with generic resolution of this issue.
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05000397/LER-2017-001 | Contactor Coil Failure Results in Tripping of HPCS Diesel Mixed Air Fan LER 17-001-00 for Columbia Generating Station Regarding Contactor Coil Failure Results in Tripping of HPCS Diesel Mixed Air Fan | 10 CFR 50.73(a)(2)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | 05000397/LER-2017-002 | Implementation of Enforcement Guidance Memorandum 11-003, Revision 3 LER 17-002-00 for Columbia Generating Station re Implementation of Enforcement Guidance Memorandum 11-003, Revision 3 | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications | 05000397/LER-2017-003 | Momentary loss of Secondary Containment due to Weather LER 17-003-00 for Columbia Generating Station Regarding Momentary Loss of Secondary Containment due to Weather | 10 CFR 50.73(a)(2)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.73(a)(2)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | 05000397/LER-2017-004 | MANUAL REACTOR SCRAM DUE TO HIGH MAIN CONDENSER BACK PRESSURE LER 17-004-00 for Columbia Generating Station Regarding Manual Reactor Scram Due to High Main Condenser Back Pressure | 10 CFR 50.73(a)(2)(iv)(A), System Actuation | 05000397/LER-2017-005 | Valve Closure Results in Momentary Increase in Secondary Containment Pressure LER 17-005-00 for Columbia Generating Station Regarding Valve Closure Results in Momentary Increase in Secondary Containment Pressure | 10 CFR 50.73(a)(2)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.73(a)(2)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | 05000397/LER-2017-006 | CONDITION PROHIBITED BY TECHNICAL SPECIFICATIONS DUE TO INCOMPLETE ACTION STATEMENT LER 17-006-00 for Columbia Generating Station for Condition Prohibited by Technical Specifications Due to Incomplete Action Statement | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications | 05000397/LER-2017-007 | Valve Closure Results in Momentary Increase in Secondary Containment Pressure LER 17-007-00 for Columbia Generating Station Regarding Valve Closure Results in Momentary Increase in Secondary Containment Pressure | 10 CFR 50.73(a)(2)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.73(a)(2)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident |
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