ML17250A346

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Responds to IE Bulletin 80-05 Re Vacuum Condition Resulting in Damage to Chemical Vol Holdup Tanks.Licensee Is Evaluating Addition of Vacuum Protection for Holdup Tanks Which Would Satisfy Criteria Discussed in Bulletin
ML17250A346
Person / Time
Site: Ginna Constellation icon.png
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 ~ 89 EAST AVENUE, ROCHESTER, N.Y. 14649 LEON D. WHITE. JR. ZCLCPHOHC VICE PRCSIOENT AREA COOK ll4 546-2700 Tune 3, 1980 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. CVCS Hold Up Tanks 15 psi
2. Reactor Coolant Drain Tank (RCDT) 25 psi (inside CV)
3. Volume Control Tank (VCT) 75/15 psi (interior/exterior) 4 ~ Refueling Water Storage Tank (RWST) Atmospheric (tank is vented

& has vacuum breakers)

5. Waste Holdup Tank (WHUT) Atmospheric (vented)
6. Pressurizer Relief Tank (PRT) 100 psi (inside containment)
7. Boric Acid Storage Tanks (BAST) Atmospheric (vented)
8. Concentrated Holding Tank (CHT) Atmospheric (vented)
9. Sodium Hydroxide Tank (NAOHT) 300 psi
10. Safety Injection Accumulators (SIA) 800 psi (inside containment)
11. Spent Resin Storage Tanks (SRST) 100 psi
12. Waste Condensate Tanks (WCT) Atmospheric (vented)
13. Reactor Makeup. Water Tank (RMUWT) Atmo sph'eric (vented)
14. Monitor Tanks (MT) 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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') "P ROCHESTER GAS AND ELECTRIC P. SHEET HO. 2 DATE June 3, 1980 To Mr. Boyce H. Grier, Director 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 will advise 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