ML20090B110
| ML20090B110 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/27/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NCR-2549, NUDOCS 8407120288 | |
| Download: ML20090B110 (2) | |
Text
.
se
- c TENNESSEE VALLEY AUTHORITY j
CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II 84 JUN 2 a [
37 June 27, 1984 BLRD-50-439/83-56 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 2 - VALVE FLOODED IN REACTOR BUILDING NORMAL SUMP
- UNIT 2 - BLRD-50-439/83 FINAL REPORT I
The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on December 1,1983 in accordance with 10 CFR 50.55(e) as NCR 2549 This was followed by our interim reports dated December 27,1983 and i
March 23,1984. Enclosed is our final report.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Licensing
+
-Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure) j Institute of Nuclear Power Operations i
1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 l
C 8407120288 840627
~
E l
gDRADOCK05000 1983-TVA SOTH ANNIVERSARY 1
An Equal Opportunity Employer L
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 2 VALVE FLOODED IN REACTOR BUILDING NORMAL SUMP - UNIT 2 BLRD-50-439/83-56 10 CFR 50.55(e)
NCR 2549 FINAL REPORT Description of Deficiency The motor-operator of valve (2WL-IFCV-068-B) in the liquid waste system was damaged by flooding of the Reactor Building normal sump tank room. An investigation was made into the apparent cause of this deficiency by Bellefonte's Division of Construction and has myealed-that the flooding was a result of a washdown of the unit 2 steam generators. During this washdown, the waste disposal system drain to the sump tank room was inadvertently left open and this msulted in the flooding of the tank room.
Safety Implications If this condition had remained uncorrected for a period of time, the valve motor operator would probably rust, preventing the proper fbnctioning of the valve to isolate containment during a loss of coolant accident. Should the valve fail to isolate the Reactor Building normal sump tank from the Auxiliary Building, highly radioactive water would be released into the Auxiliary Building. Thus, the maximum onsite dose in the Auxiliary Building might be exceeded, and the release of radioactivity to the environment could exceed 10 CFR 100 limits.
Corrective Action Limitorque (the supplier for the motor operator, in question) will provide shipping instructions to TVA in order that the motor operator can be returned for rework. When the reworked motor operator is mturned from the vendor, it will be stored and maintained in the controlled environment of the warehouse until it is mquired to support motor operation. Based on the unit 2 schedule, the reinstallation of the motor operator is expected to be complete by March 16, 1987. TVA considers this deficiency an isolated occurrence; therefore, no fbrther action is required to prevent recurrence.
J,_
k.3 b lnty
_ _ g),
= _.
+ - - - -. -. - :2_ m e --
A