ML17158A582
| ML17158A582 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 03/23/1995 |
| From: | Poslusny C Office of Nuclear Reactor Regulation |
| To: | Byram R PENNSYLVANIA POWER & LIGHT CO. |
| Shared Package | |
| ML17158A583 | List: |
| References | |
| GL-94-03, GL-94-3, TAC-M90112, TAC-M90113, NUDOCS 9503270184 | |
| Download: ML17158A582 (5) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSlON WASHINGTON, D.C. 2055&4001 March 23, 1995 Hr. Robert G.
Byram Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, PA 18101
SUBJECT:
GENERIC LETTER (GL) 94-03, "INTERGRANULAR STRESS CORROSION CRACKING OF CORE SHROUDS IN BWRs,"
PENNSYLVANIA POWER AND LIGHT COMPANY, SUS(UEHANNA STEAM ELECTRIC STATION, UNITS 1
AND 2 (TAC NOS.
H90112 AND H90113)
Dear Hr. Byram:
By letter dated August 24,
- 1994, Pennsylvania Power and Light Company, the
- licensee, provided its response to Generic Letter (GL) 94-03, "Intergranular Stress Corrosion Cracking of Core Shrouds in BWRs,
" for the Susquehanna'team Electric Station, Units 1 and 2.
The NRC staff requested in GL 94-03 that licensees take the following actions with respect to their core shrouds:
(1) inspect their core shroud in their BWR plants no later than the next refueling outage; (2) perform materials-related and plant-specific consequence safety analyses with respect to their core shrouds; (3) develop core shroud inspection plans which address inspection of all core shroud welds and which takes into account the latest available inspection technology; (4) develop plans for evaluation and/or repair of their core shrouds; and (5) work closely with the BWR Owners'roup with respect to addressing intergranular stress corrosion cracking of BWR internals.
The NRC staff required that licensees
- submit, under oath or affirmation, the following information in response to GL 94-03 within 30 days of the date of issuance:
(1) a schedule for inspection of their core shroud; (2) a safety
- analysis, including a plant-specific safety analysis as appropriate, which supports continued operation of the facility until inspections are conducted; (3) a drawing(s) of the core shroud configuration; and (4) a history of shroud inspections completed to date.
The NRC staff also required that licensees
- submit, under oath or affirmation, no later than 3 months prior to performing their core shroud inspections, their scope for inspection of their core shroud and their plans for evaluating and/or repairing their core shroud based on inspection results.
Accordingly, you submitted on December 19, 1994, the scope and schedule for the SSES Unit 1 core shroud inspection, which is currently under staff review.
As you indicated in your August response, the inspections will be conducted on Unit 1 during the spring 1995 outage, and on Unit 2 during the fall 1995 outage.
The NRC staff further required licensees to submit, under oath or affirmation, their core shroud inspection results within 30 days of completing their shroud examination.
The NRC staff has completed its review of your }"esponse.
Based on the staff's review of the response to GL 94-03, and in regard to the information that was 2d PiA~A 9S03V70XSC 9S0323 PDR ADOCK 05000387 P
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requested to be submitted within 30 days of the date of issuance of the GL, the staff has determined that Pennsylvania Power and Light Company has provided the necessary information for the staff to complete its review.
The staff concludes that while cracking cannot be entirely ruled out, the Susquehanna core shrouds are not likely to contain cracks which could compromise its structural integrity.
The low water conductivity, short operational
- time, and use of low carbon materials minimize the potential for the initiation and growth of structurally significant cracks.
The staff concludes that the licensee's materials-based safety assessment of the Susquehanna core shrouds is sufficient to justify continued safe operation of the unit until the next core shroud inspection without necessitating a
detailed consequence analysis.
However, per the reporting requirements of GL 94-03, PP&L shall
- submit, no later than 90 days prior to entering the outage in which the core shroud inspection for Unit 2 is scheduled to occur, a
detailed inspection scope for a more comprehensive examination of the core shroud.
Docket Nos.
50-387/388
Enclosure:
As stated cc:
See next page DISTRIBUTION
~. Docket File ',
PUBLIC PDI-2 Reading SVarga JZwolinski JStolz CPoslusny HO'Brien OGC ACRS(4)
JStrosnider Sincerely,
/s/
Chester
- Poslusny, Project Hanager Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation ECarpenter
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SU90112.GEN
requested to be submitted within 30 days of the date of issuance of the GL, the staff has determined that Pennsylvania Power and Light Company has provided the necessary information for the staff to complete its review.
The staff concludes that while cracking cannot be entirely ruled out, the Susquehanna core shrouds are not likely to contain cracks which could compromise its structural integrity.
The low water conductivity, short operational
- time, and use of low carbon materials minimize the potential for the initiation and growth of structurally significant cracks.
The staff concludes that the licensee's materials-based safety assessment of the Susquehanna core shrouds is sufficient to justify continued safe operation of the unit until the next core shroud inspection without necessitating a
detailed consequence analysis.
- However, per the reporting requirements of GL 94-03, PPLL shall submit, no later than 90 days prior to entering the outage in which the core shroud inspection for Unit 2 is scheduled to occur, a
detailed inspection scope for a more comprehensive examination of the core shroud.
Sincerely, Docket Nos.
50-387/388
Enclosure:
As stated cc:
See next page Q'~c ~~
Chester Poslusny~
Project Manager Project Directorate I-2 Division of Reactor Projects I/II Office of 'Nuclear Reactor Regulation
Mr. Robert G.
Byram Pennsylvania Power
& Light Company Susquehanna Steam Electric Station, Units 1
& 2 CC:
Jay Silberg, Esq.
- Shaw, Pittman, Potts
& Trowbridge 2300 N Street N.W.
Washington, D.C.
20037 Bryan A. Snapp, Esq.
Assistant Corporate Counsel Pennsylvania Power
& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mr. J.
M. Kenny Licensing Group Supervisor Pennsylvania Power
& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mrs. Maitri Banerjee Senior Resident Inspector U. S. Nuclear Regulatory Commission P.O.
Box 35 Berwick, Pennsylvania 18603-0035 Mr. William P. Dornsife, Director Bureau of Radiation Protection Pennsylvania Department of Environmental Resources P. 0.
Box 8469 Harrisburg, Pennsylvania 17105-8469 Mr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.
212 Locust Street P.O.
Box 1266 Harrisburg, Pennsylvania 17108-1266 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. Harold G. Stanley Vice President-Nuclear Operations Susquehanna Steam Electric Station Pennsylvania Power and Light Company Box 467 Berwick, Pennsylvania 18603 Mr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company Rural Route 1,
Box 1797 Berwick, Pennsylvania 18603 George T. Jones Vice President-Nuclear Engineering Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 3ohn Willis, Coordinator Nuclear Campaign Greenpeace International 1436 U Street, NW Washington, DC 20009