ML17250A346
| ML17250A346 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 06/03/1980 |
| From: | White L ROCHESTER GAS & ELECTRIC CORP. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-05, IEB-80-5, NUDOCS 8006300346 | |
| Download: ML17250A346 (4) | |
Text
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ROCHESTER GAS AND ELECTRIC CORPORATION
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89 EAST AVENUE, ROCHESTER, N.Y. 14649 LEON D. WHITE. JR.
VICE PRCSIOENT Tune 3, 1980 ZCLCPHOHC AREA COOK ll4 546-2700 Mr. Boyce H. Grier, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406
Subject:
IE Bulletin No. 80-05 "Vacuum Condition Resulting in Damage, to'Chemical Volume Control System (CVCS) Holdup Tanks" R. E. Ginna Nuclear Power Plant, Unit $ 1 Docket No. 50-244
Dear Mr. Grier:
In response to Inspection and Enforcement Bulletin 80-05 dated March 10, 1980, concerning vacuum damage of tanks at Trojan, Rancho Seco, Turkey Point and Salem, all the tanks at Ginna Station that could possibly be valved to receive primary system water were reviewed for the possibility of tank damage due to vacuum conditions.
Those reviewed are listed below.
TANK DESIGN PRESSURE 1.
2.
3.
4 ~
CVCS Hold Up Tanks Reactor Coolant Drain Tank (RCDT)
Volume Control Tank (VCT)
Refueling Water Storage Tank (RWST) 5.
Waste Holdup Tank (WHUT) 6.
Pressurizer Relief Tank (PRT) 7.
Boric Acid Storage Tanks (BAST) 8.
Concentrated Holding Tank (CHT) 9.
Sodium Hydroxide Tank (NAOHT) 10.
Safety Injection Accumulators (SIA) 11.
Spent Resin Storage Tanks (SRST) 12.
Waste Condensate Tanks (WCT) 13.
Reactor Makeup. Water Tank (RMUWT) 14.
Monitor Tanks (MT) 15 psi 25 psi (inside CV) 75/15 psi (interior/exterior)
Atmospheric (tank is vented
& has vacuum breakers)
Atmospheric (vented) 100 psi (inside containment)
Atmospheric (vented)
Atmospheric (vented) 300 psi 800 psi (inside containment) 100 psi Atmospheric (vented)
Atmosph'eric (vented)
Atmospheric (vented)
It was concluded that the CVCS holdup tanks are the only tanks at Ginna Station to which the subject bulletin applies.
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ROCHESTER GAS AND ELECTRIC P.
DATE June 3, 1980 To Mr. Boyce H. Grier, Director SHEET HO.
2 The possibility of inducing a vacuum condition with inward buckling became well known at Ginna Station following such an event at Beznau, Switzerland in 1970.
Measures to prevent this were provided in the proce-dure S-3.2D, Transferring Water from CVCS HUT's to RWST or SPP.
In the history of the plant there have been no such failures.
Nevertheless, we recognize the USNRC concern for the possibility of problems during "abnormal conditions," and we are evaluating the addi-tion of vacuum protection for the CVCS holdup tanks which would satisfy the criteria discussed in the bulletin.
We expect the results of our evalua-tion to be 'complete by October 1, 1980, and at that time we willadvise you of our further plans.
Very truly yours, L. D. Wh te, Jr.
cc:
Mr. Victor Stello, Jr., Director Office of Inspection and Enforcement
, U. S. Nuclear Regulatory Commission Washington,, D. C.
20555