IR 05000352/1986012

Insp Rept 50-352/86-12 on 860527-30.No Violations or Deviations Noted.Major Areas Inspected:Test Witnessing & Preliminary Results Evaluation of Local Leak Rate Test & Facility Tour

ML20199K912
Person / Time
Site:	Limerick
Issue date:	07/01/1986
From:	Anderson C, Chung J, Joe Golla NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20199K902	List: IR 05000352/1986012 ML20199K896
References
50-352-86-12, NUDOCS 8607090275
Download: ML20199K912 (6)

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l U.S. NUCLEAR REGULATORY COMMISSION I

REGION I

Report N /86-12 Docket N License No. NPF-39 Category C Licensee: Philadelphia Electric Company Facility Name: Limerick Nuclear Generating Station, Unit 1 Inspection At: Limerick, Pennsylvania

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Inspection Conducted: May 27-30, 1986 Inspectors: WAu - w4h '7/. 2.0 Local Leak Rate Testing (LLRT) The purpose of this inspection was to ascertain that the LLRT was con-ducted in compliance with the requirements and commitments referenced in the following sections 2.1 and 2.2, and that the test results met the acceptance criteria specified in the station-procedures and Appendix J, 10 CFR 50. The procedures were reviewed for their technical adequacy to perform the intended activitie .1 References 10 CFR; Dart 50, Appendix J, Primary Reactor Containment Leakage

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Testing for Water Cooled Power Reactors , Limerick Unit 1 Technical Specificati,ons Sections 3/4.6.1, j Primary Containment Final Safety Analysis Report (FSAR)

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ANSI /ANS 56.8-1981, Containment Systems Leakage Testing Require-ments USNRC I&E Information Notice No. 85-71; Containment Integrated Leak Rate Tests I i

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2.2 Documents Reviewed

ST-1-LLR-001-1, The LLRT Program and Accountability Test, Revision 3 ST-1-LLR-002-1, Primary Reactor Containment Test TAP LLRT, Revision 0

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LGS Nuclear Training Lesson Plan Index Engineer Training Program - Integrated and Local Leak Rate Testing

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ST-1-LLR-471-1, "C" RHR LPCI, Revision 4

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PMQ-095-005, Preventive Maintenance Procedure for Q-listed 250 Vdc Magnetic Starters - Westinghouse, Class 9022, Revision 1

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PMQ-500-022, Preventive Maintenance Procedure for Q-listed Limitorque Actuator (SMB-000) Overhaul, Revision 0 A-26, Procedure for Corrective Maintenance, Revision 8

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Maintenance Request Form (MRF) #8603247, RHR Vacuum Relief Valve, May 29, 1986 A-26, Appendix 1, Instructions for completing the Limerick Generating Station Maintenance Request Form (MRF) for corrective Maintenance, Revision 3 A-26, Appendix 2, Instructions for completing the Limerick Generating Station Equipment Trouble Tag, Revision 2

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A-26, Appendix 3, Instructions for completing the Limerick Generating Station Operation Verification Form, Revision 1 A-26, Appendix 4, Instru:"isns for completing Limerick Generating Station Parts List, Revision 0.

I 2.3 Test Instrumentation Calibration records of the leak rate monitors and the mass flow meter were reviewed to assure that all test equipment have been calibrated over the normal range of conditions experienced during the LLRT, and that calibration of instruments used in the LLRT have been performed no more than 6 months before the LLRT. The traceability of calib-rations to National Bureau of Stancards (NBS) was also evaluate The following are the calibratica -ecords reviewed: . f

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Leak Rate Monitors: 21-1122 performed 5/16/86, 4/25/86, 9/19/85, 7/20/85, 3/26/85, 2/21/85, 10/30/84, 8/5/84, 7/6/84; 21-1107 performed 5/16/86, 4/25/86, 11/4/85, 8/14/85, 11/12/84, 8/15/84; 21-1108 performed 5/19/86, 5/16/85, 4/25/86, 1/24/85, 7/11/85, 5/11/85; 21-1121 performed 5/16/86, 4/25/86, 1/24/85, 6/23/85, 7/6/84; 21-1106 performed 4/25/86, 11/24/85, 11/13/85, 8/14/85, 5/11/85; 21-1109 performed 5/16/86, 4/25/86, 10/1/85, 7/11/85, 3/5/85; 21-1120 performed 4/25/86, 9/19/85, 8/3/85, 6/23/85, 3/26/85, 8/15/84, 7/6/8 * Mass Flow Meters: 21-1237 performed 12/31/85; 21-1236 performed

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4/3/8 Findings The instrument calibration records indicated that "As Left" values and test results met the acceptance limits, and no unacceptable conditions were identifie The test instruments used for the leak rate monitor calibrations were

 #25-7493 Heise gage and #21-1237 mass flow meter, and the licensee stated that their certificates of traceability to NBS were kept at the corporate headquarter .4 Test Witnessing The inspector witnessed the performance of test activities to verify that:
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approved test procedures were available and in us * the procedures were adequately detailed to assure satisfactory performanc parts and materials were properly identified.

i qualified test equipment and tools were use The following tests were witnessed:

 (1) Penetration X-225, RHR Vacuum Relief Valves, HV-51-130 and HV-51-131, performed May 29, 198 (2) Drywell Head Access Manhole, ST-1-LLR-805-1, Revision 1, per-formed May 29, 1986 (3) Penetration X-24, Reactor Er:losure Cooling Water Return,
 , ST-1-LLR-211-1, Revision 1, performed May 28, 1986.

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Findings On May 19, 1986, RHR vacuum relief valves, HV-51-130 and HV-51-131, were air-tested, and the 131 valve failed due to excessive leakage through the valve seating by failing to close fully. A MRF #8603247 was issued, and the 131 valve was retested on May 29, 1986. Again, the valve failed to maintain the test pressure and a MRF #8603483 was issue Because of the excessive leakace through the 131b valve the "As Found" running total of the LLRT exceeded the acceptance criterion of 0.6 La. This will be further discussed in the following paragraph 2.5. A local leak leak test of drywell head access manhole was witnessed at 2:25pm, May 29, 1986. The inspector noted that test personnel were using an approved test procedure, ST-1-LLR-805-1, and that the test engineer superimposed a known leakage of 84.6 SCCM as per procedural instructions because of a relatively small lea .5 Test Results As of May 28, 1986, the inspector was informed that LLRT of more than 30 penetrations were not completed, and a running total of "As Found" LLRTs was 100,369.93 SCCM. Acceptance criterion in Technical Specifications 4.6.1.la for tne combined LLRTs (B and C tests) was 0.6 La, which is equivalent to 94,964 SCC The licensee confirmed the failure of the test, and stated that an LER would be issued under 10 CFR 50.73, 30 day reporting requirement .0 Personnel Training and Qualifications The qualification and training of selected test personnel were discussed with a licensee representativ In addition the inspector evaluated the performance of test engineers during the test witnessin The inspector determined that the test engineers qualifications met the requirements specified in ANSI N 18.1-1971 " Selection and training of nuclear power plant personnel". They were knowledgeable of their respon-sibilities and technical aspects of leak testing No unacceptable conditions were identifie .0 QA/QC The inspector discussed with a QA/QC representative their coverage of the LLRTs, and reviewed the following QA/0C audit documents:

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QA Detailed Monitoring Checklist. _-OP-15.1, Surveillance Test Per-formance of LLRT Supplement Flco 'r. Test Method.

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L-OP-15.2, Surveillance Test Performance of LLRT Supplement Hydro Flow Rate with Pressure Regulator / surge Tank Metho * QA audit and review of LLRTs performed May 22, 198 QA Monitoring Report LMR-86-0617, L-0P-15 and L-0P-15.1, performed May 21, 198 The inspector observed a surveillance inspection by a QC inspector during

"C" LPCI LLRT on May 30, 198 Based on the above reviews and observations, it was concluded that QA/QC coverage during the LLRT activities was adequate. No unacceptable.condi-tions were identifie .0 Tours The inspector made several tours of the plant including turbine building penetration areas, control room, and refueling floor, in order to monitor the activities related to performance of the *.LRT No unacceptable conditions were identifie .0 Exit Meeting Licensee management was informed of the purpose and scope of the ins-pection at the entrance interview. The findings of the inspection were periodically discussed and were summarized at the exit meeting on May 30, 198 Attendees at the exit meeting are listed in Section 1.0 of this repor At no time during the inspection was written material provided to the licensee by the inspectors.

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