ML20213F551
| ML20213F551 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 11/05/1986 |
| From: | Kober R ROCHESTER GAS & ELECTRIC CORP. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-86-003, IEB-86-3, NUDOCS 8611140278 | |
| Download: ML20213F551 (2) | |
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'((, g staviy ROCHESTER GAS AND ELECTRIC CORPORATION e 89 EAST AVENUE, ROCHESTER, N.Y.14649b001 A E oc ur Trtre-ose ELECTmC in STE AM F44ODUCTION a.f a ( ODE 7 6 6 546 2700 November 5, 1986 Dr. Thomas E. Murley, Regional Administrator U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406
SUBJECT:
IE Compliance Bulletin No. 86-03:
Potential Failure of Multiple ECCS Pumps Due to Single Failure caf Air Operated Valve in Minimum Flow Recirculation Line In response to IE Compliance Bulletin No. 86-03, "Patential Failure of Multiple ECCS Pumps Due to Single Failure of Air Operated Valve in Minimum Flow Recirculation Line", the following is hereby submitted.
At the Ginna Plant, the three (3) Safety Injection Pumps share a common recirculation flow line that is equipped with two copes-Vulcan air-operated valves in series.
These valves are a fail-closed design thereby eliminating recirculation capabilities upon loss of instrument air or electrical control power.
As stated in IEB 86-03, Rochester Gas and Elactric had previously identified the described deficiency at our Ginna Plant.
The short-term corrective actions involved mechanically blocking open the recirculation valves to preclude inadvertent closure and insure a minimum flow path.
Required operator actions were procedurally delineated in ES-1.3 " Transfer to Cold Leg Recirculation".
Instructions address both block removal and contingency actions for manual isolation in the event that block removal cannot be achieved.
All operating shifts have been trained in the above and have acknowledged these changes.
Design, review and approval was completed and installation implemented on August 7, 1986.
The above short-term corrective actions are justification for compliance with General Design Criteria (GDC) 35.
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RGCHESTER CAS AND ELECTRIC CORP.
SHEET NO. 2 DATE November 5, 1986 TO Dr. Thomas E. Murley Alternatives are presently being assessed for long-term resolution.
This will be responded to in more detail in our 90 day submittal to your office.
V truly yours, W da Roger W.
Kober Subscribed and sworn to me on this 5th day of Novem' er 1986 o
LYNN I. HAUCK
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Notary Pbtac a b b d Na yd e
MONROECOUNTY Cremumon Empun Nov 30 198%
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U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
20555
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