ML19302F760
| ML19302F760 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/21/1985 |
| From: | Thompson H Office of Nuclear Reactor Regulation |
| To: | NRC ATOMIC SAFETY & LICENSING APPEAL PANEL (ASLAP) |
| References | |
| CON-#285-113, CON-#285-302, TASK-AS, TASK-BN85-056 BN-85-056, OL, NUDOCS 8505300129 | |
| Download: ML19302F760 (4) | |
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May 21, 1985 Docket Nos. 50-413 and 50-414 MEMORANDUM FOR:
The Atomic Safety and Licensing Appeal Board for Catawba Nuclear Station (A. Rosenthal, T. Moore, and H. Wilber)
FROM:
Thomas M. Novak, Assistant Director for Licensing Division of Licensing
SUBJECT:
BOARD NOTIFICATION REGARDING SYSTEM OVERPRESSURIZATION EVENTS (BN 85-056)
This Notification is being provided for ir. formation purposes in accordance with NRC procedures for Board Notifications. The matters described below appear to raise issues, within the scope of Appendix B to 10 CFR Part 50, which were not among the issues considered within the scope of the quality assurance contention in the Catawba operating license proceeding.
The parties to the proceeding are also being informed by copy of this memorandum.
On April 19-20, 1985, two unrelatei overpressurization events occurred during initial hydrostatic testing preparation of the Unit 2 reactor coolant system.
1.
On April 19, portions of the Residual Heat Removal (RHR), Boron Recycle, Nuclear Sampling and Chemical and Volume Control Systems were inadvertently pressurized to 2000 psig. The RHR design pressure is 600 psig. The design pressure for the Boron Recycle, Nuclear Sampling and Chemical and Volume Control Systems is at or below 300 psig. The event was caused by personnel error in not closing two specified motor-operated valves and an earlier blocking of the effluent path of an RHR relief valve during the isolation of Unit 1 from Unit 2.
Licensee is presently evaluating the event and will issue a Construction Deficiency Report by May 31, 1085.
2.
On April 20, a catastrophic failure resulted to the 75-psig designed Volume Control Tank (VCT) when it was inadvertently overpressurized during its use as a surge tank. The VCT is a 3000 gallon stainiess steel tank with a nitrogen gas blanket above the VCT water level.
The failure occurred from inadequate administrative control while increasing the water level in the tank and again the earlier blocking of the effluent path of the VCT relief valve during the isolation of Unit I from Unit 2.
Two mechanics working outside the room received minor injuries.
Licensee evaluation is in progres;. The tank is being replaced.
A Construction Deficiency Report is due May 22, 1985.
8505300129
2-Additional information, including the Construction Deficiency Reports, will be provided once available.
The NRC staff vill review these reports and the licensee's corrective actions, and will assure resolution prior to a finding of plant completion.
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Thomas 4.--h f, Assistan 45rectcr s fo,rd'i censing D1Yision of Licensing
Enclosures:
As stated cc: ACRS (10)
ED0 J. Kelley, ASLB R. Foster, ASLB P. Purdom, ASLB Parties to the Proceeding See next page
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DISTRIBUTION LIST FOR BOARD NOTIFICATION Catawba Unit 1 Docket No. 50-4]3/4F conn Clewett, Esq.
Dr. Richard F. Foster Robert Guild, Esq.
Dr. Frank F. Hooper James L. Kelley, Esq.
Dr. Pobert it. lazo Karen E. Long Morton C. Margulies, Esq.
J. liichael McGarry, III, Esq.
Palmetto Alliance Spence Perry, Esq.
William L. Porter, Esq.
'Dr. Paul H. Purdom Jesse L. Riley Mr. Donald R. Willard Richard P. Wilson, Esq.
Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Sertion Document Management Branch
CATAWBA BN ADDRESSES Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242 North Carolina MPA-1 P.O. Box 95162 Raleigh, North Carolina 27625 Mr. F. J. Twogood Power Systems Division
_ Westinghouse Electric Corp.
P. O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. J. C. Plunkett, Jr.
NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Mr. Pierce H. Skinner Route 2, Box 179N York, South Carolir.a 29745 North Carolina Electric Membership Corp.
3333 North Boulevard
.P.O. Box 27306 Raleigh, North Carolina 27611 Saluda River Electric Cooperative, Inc.
201 Sherwood Drive Laurens, South Carolina 29360 Mr. Peter K. VanDoorn Route 2, Box 179N York, South Carolina 29745 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Spence Perry, Escuire Associate General Counsel Federal Emergency Management Agency 500 C Street, S.W. - Room S40 Washington, D.C.
20472 Mark S. Calvert, Esq.
Bishop, Liberman, Cook, Purcell & Reynolds 1200 17th Street, N.W.
Washington, D.C.
20036