ML20087P971
| ML20087P971 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 01/27/1984 |
| From: | Maier J ROCHESTER GAS & ELECTRIC CORP. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 8404100162 | |
| Download: ML20087P971 (2) | |
Text
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r ROCHESTER GAS AND ELECTRIC CORPORATION
- 89 EAST AVENUE, ROCHESTER, N.Y.14649 JOHN E MAIER vis. rwo%r w
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.... m, m ;a s.2 7 00 January 27, 1984 Dr. Thomas E.
Murley, Regional Administrator U.
S. Nuclear Regulatory Commision Region I 631 Park Avenue King of Prussia, PA 19406
Subject:
Turbine Driven Auxiliary Feedwater Pump Inoperable Due To Steam Stop Valve Being Inadve_rtently Tripped.
R.
E.
Ginna Nuclear Power Plant, Unit No. 1 Docket No. 50-244
Dear Dr. Murley:
As followup to the one hour notification provided your office j on 12/28/83 regarding the subject condition, the following information is provided:
During the performance of operator tours in the Intermediate Building on 12/28/83 at 0045 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br />, the Turbine Driven Auxiliary Feedwater Pump Steam Stop Valve was found in the tripped position although the Control Room indication indicated the valve was open.
The condition resulted in the Turbine Driven Auxiliary.
Feedwater Pump being inoperable for a period of time less than T.S.
3.4.3.b Limiting Condition for Operation.
At this time, both Motor Driven Auxiliary Feedwater Pumps and both Standby Auxiliary Feedwater Pumps were operable as required by Technical Specifications.
Prior to this event the Turbine Driven Auxiliary Feedwater Pump and Steam Stop Valve were verified operable by testing per PT-16 on 12/19/83.
The cause of this Steam Stop Valve being in the tripped condition was confirmed to be an insulator contractor who inadvertantly stepped on the valve trip mechanism when climbing to a scaffold directly above the Steam Stop Valve.
Subsequent investigation and review of security logs revealed that the
. contractor first entered this area on the day shif t on 12/21/83 to begin work.
The cause of the valve not indicating tripped appears to be from a buildup of dust / dirt on the trip device of'the valve.
As a result of this occurrence, the following actions were taken:
'Y 3404100162 840127 DR ADDcK 0500024j
{7 4
1
1.
The. Turbine Driven Auxiliary Peedwater Pump was declared
~
inoperable and the stop valve trip mechanism was inspected, cleaned and relubricated.
In addition, the valve limit switch was checked for proper operation.
2.-
Operations performed a safety systems alignment verification
. per S-30.1 thru S-30.5 procedures.
3.
Following maintenance, the stop valve was retested satisfactorily
'three times on 12/28/83 per PT-16 and the Turbine Auxiliary Feedwater Pump then declared operable.
4.
' Contractor personnel were instructed to keep off plant equipment when working in such areas.
5.-
A sign was placed in the vicinity of the stop valve to warn personnel.to keep off when' working in the area.
6.
Measures were instituted to clean the general area'and maintain cleanliness during on-going modification ~ and maintenance activities.
Subsequent reviews by plant personnel have determined this item not to be reportable.
Very truly.yours, I
I
/
Joh~n E. Maier c
'xc:
Document Control Desk (1)-
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