ML16341D544
| ML16341D544 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/09/1985 |
| From: | Schierling H Office of Nuclear Reactor Regulation |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| TAC-60829, TAC-60830, NUDOCS 8512300004 | |
| Download: ML16341D544 (16) | |
Text
December 9,
1985 Docket No. 50-275 LICENSEE:
Pacific Gas and Electric Company FACILITY: Diablo Canyon Power Plant, Unit 1
SUBJECT:
MEETING
SUMMARY
- IST PROGRAM The NRC staff met with PG&E representatives on November 4, 1985 in Bethesda, Maryland to discuss the following inservice testing
( IST) issues that had been identified by the staff with respect to the Diablo Canyon Power Plant (DCPP) Unit 1 in SSER 31 (April 1985):
1.
Check Valves (SSER 31, Section 5.2.8. 1, Item 13) 2.
Pump Flow Measurements (SSER 31, Section 5.2.8. 1, Item 4) 3.
Vibration (SSER 31, Section 5.2.8. 1, Item 3)
Details of the discussion are presented below, meeting attendees are listed in Enclosure 1, the meeting announcement is Enclosure 2.
The above items were addressed with respect to Unit 1 only.
1.
Check Valves In SSER 31 the staff had identified certain check valves in the safety injection system and residual heat removal system as performing a pressure boundary isolation function and stated that they should be reclassified and listed in accordance with applicable Technical Specifications.
PG&E provided additional information to the staff on these valves in Letter No. DCL-85-320, dated October ll, 1985.
The staff stated that at least two valves are required at each reactor coolant system high pressure boundary to prevent an inter-system LOCA and both valves must be included in the Technical Specifica-tions and be tested.
Since the DCPP Unit 1 has three valves in each RCS high pressure boundary of the safety injection and residual heat removal
- systems, PG&E suggested that all three valves be included in the Technical Specifica-tions with the requirement that any two out of the three be successfully leak rate tested.
The staff stated that the approach would be acceptable.
PG&E stated that, as a minimum the following valves would be included in the Technical Specifications:
8949 A, B, C and D; 8802 A and B; 8703.
The staff suggested that PG&E submit a license amendment request to this effect, including appropriate system drawings.
The request should be provided no later than January 1986.
8512300004 85120V PDR ADQCK 05000275 l
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Pump Flow Measurements As stated in SSER 31 PG&E had requested specific relief from measuring the flowrate for the centrifugal charging pumps, auxiliary feed water pumps, diesel fuel oil transfer pumps, boric acid transfer
- pumps, and make up water transfer pumps in accordance with the requirements of ASME Code Section XI.
At the meeting the NRC Staff restated the requirements for flowrate measurements of pumps that are identified in the inservice testing program.
The staff also stated that if PG&E could demonstrate that the installation of the necessary instrumentation was impractical the staff would consider requests for relief as appropriate.
PG&E and the staff discussed various methods of measuring flow in the pumps of the above systems.
Methods discussed included flow measuring devices and liquid transfer (i.e., tank pumpdown) using changes in tank levels and mathema-tical calculations.
PG&E identified a potential difficulty in meeting the Code accuracy requirements for boric acid flow instrumentation and liquid transfer flowrate measurement.
The staff indicated that relief requests concerning instrument accuracy, if needed, would be appropriately considered.
PG&E agreed to update the inservice testing in a forthcoming submittal to
.include the requirements for flow measurement and any necessary relief requests regarding flow measurement accuracy prior to startup after the first refueling outage, in accordance with the schedule outlined in SSER 31.
3.
Vibration Measurements As stated in SSER 31, PG&E had requested relief from the requirement of measuring displacement vibration amplitude for all pumps in the IST program and as an alternate had proposed measuring vibration velocity for those pumps.
The staff had identified in Table 5. 1 of SSER 31 the acceptance criteria to be applied.
At the meeting PG&E presented the basis for the relief request to measure pump vibration in units of velocity.
PG&E dis-cussed the method proposed for vibration limit determination.
The staff took exception to direct conversion of displacement
- values, as currently described in Section XI, to equivalent velocity values at the pump operating speed.
PG&E and the staff discussed the limits proposed in SSER 31.
PG&E was concerned with the apparently conservative limits prescribed in relation to that of the Code.
PG&E discussed overall relaxation of the staff proposed limits.
The staff was receptive only to relaxation on a case-by-case basis.
PG&E will investigate this option further and respond with a revision to the IST program and a schedule for its implementation.
Conclusion PG&E will evaluate the staff comments and will submit appropriate revisions to the IST program for DCPP Unit 1, including request for relief as necessary.
PG&E will consider to submit a license amendment request regarding the J
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December 9, 1985 inclusion of check valves as discussed under Item 1 above.
If necessary, PG&E will contact the staff for future clarification prior to future submittals on the IST program.
The meeting adjourned in the afternoon, November 4, 1985.
/s/HSchierling
Enclosures:
As stated Hans Schierling, Project Manager PWR Project Directorate ¹3 Division of PWR Licensing-A cc w/enclosures:
See next page PWR¹3-PWR¹3-A
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Mr. J.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:
Philip A. Crane, Jr.,
Esq.
Pacific Gas
& Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Malcolm H. Furbush Vice President - General Counsel Pacific Gas
& Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 McAllister Street San Francisco, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 More Mesa Drive Santa Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Mr. Gordon A. Silver Ms. Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Harry M. Willis, Esq.
Seymour
& Willis 601 California Street, Suite 2100 San Francisco, California 94108 Mr. Richard Hubbard MHB Technical Associates Suite K
1725 Hamilton Avenue San Jose, California 95125 Mr. John Marrs, Managing Editor San Luis Obis o Count Tele ram Tribune o nson venue P. 0.
Box 112 San Luis Obispo, California 93406 Resident Inspector/Diablo Canyon NPS c/o US Nuclear Regulatory Cotanission P.
0.
Box 369 Avila Beach, California 93424 Ms.
Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel
- Reynolds, Esq.
John R. Phillips, Esq.
Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor & Co-Publisher South County Publishing Company P.
0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
Norton, Burke, Berry
& French, P.C.
202 E.
Osborn Road P. 0.
Box 10569 Phoenix, Arizona 85064 Mr.
W.
C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.
P. 0.
Box 1178 Oklahoma City, Oklahoma 73101
Pacific Gas 8 Electric Company Diablo Canyon CC:
Arthur C. Gehr; Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. Leland M. Gustafson, Manager Federal Relations Pacific Gas 8 Electric Company 1726 M Street, N.W.
Suite 1100 Washington, DC 20036-4502 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Michael J. Strumwasser, Esq.
Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Mr. Tom Harris Sacramento Bee 21st and 0 Streets Sacramento, California 95814 Mr. H. Daniel Nix California Energy Commission 1516 9th Street, MS 18 Sacramento, California 95814 Lewis Shollenberger, Esq.
US Nuclear Regulatory Commission Region V
1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mr. Thomas Devine Government Accountability Project Institute for Policy Studies 1901 Que Street, NW Washington, DC 20009
LIST OF ATTENDEES NRC/PGSE MEETING, NOVEMBER 4, 1985 ENCLOSURE 1
Hans Schierling Charles
- 0. Coffer Lawrence F.
Womak Thomas W. Libs Joel D. Page Robert Kirkwood NRC/NRR/DL/LB3 PGSE PGSE PGSE NRC/NRR/DE/MEB NRC/NRR/DE/MEB
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ENCLOSURE 2 Docket Nos.:
50-275 and 50-323 MEMORANDUM FOR:
George W. Knighton, Chief Licensing Branch No.
3 I
Division of Licensing FROM
SUBJECT:
Hans Schierling, Project Manager Licensing Branch No.
3 Division of Licensing DIABLO CANYON - ISI/IST MEETING WITH PGSE DATE 5 TIME'OCATION:
PURPOSE:
November 4 and 5, 1985 9:00 am - 5:00 pm Room P-110 Phillips Building 7920 Norfolk Avenue
- Bethesda, Maryland Discuss Inservice Testing and Inspection PARTICIPANTS:
NRC H. Schierling J.
Page R. Kirkwood PGKE L. Womak M. Angus B. Lew, et al.
cc:
See next page P, J.Su Hans Schierling, Project Manager Licensing Branch No.
3 Division of Licensing
MEETING
SUMMARY
DISTRIBUTION cket r Central file DR Local PDR ORBgl RDG J. Partlow (Emergency Preparedness only)
Steve Varga H. Scherling OELD E. Jordan P.
McKee ACRS (10)
NSIC Gray file Plant Service List C. Parrish J. Partlow NRC Partici ants J.
Page R.
Kirkwood
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