ML20133A902
| ML20133A902 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 08/08/1985 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-1982), (55(E)-84-10), (55(E)-84-21), (55(E)-84-40), (55(E)-84-42), (55(E)-84-46), (NMP2L-0464), (NMP2L-464), NUDOCS 8510020433 | |
| Download: ML20133A902 (3) | |
Text
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M V NIAGARA
..,R UMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE. N Y,13202/ TELEPHONE (315) 4741511 August 8, 1985 (NMP2L 0464)
Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Commission Region I Division of Reactor Projects 631 Park Avenue King of Prussia, PA 19406 Re:
Nine Mile Point - Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
As a result of our continuing review of the status of commitments, we have identified a number of items for which clarification and/or updating is appropriate.
These items are related to reports which were submitted to the Commission under the provisions of 10CFR50.55(e).
The specific clarifications / updates are as follows:
(55(e)-84-10) Reverse / Backpressure on Valves Furnished by Clow Corporation Valve Mark ' Number 2RHS*MOVl'B was scheduled to be seismicly tested by mid-July, 1985.
This test has been delayed and is rescheduled so valve installation will be completed by September 30, 1985.
Installation of valves 2RHS*MOV30A & 30B will also be completed by September'30, 1985.
(55(e)-84-21) Service Life of Relays The corrective action for this deficiency calls for the establishment of a replacement parts program for the relays in question.
At present, Stone & Webster uses Project Guideline 94, Equipment Qualification Early Warning Notices, to identify equipment with services lives less than six years.
An Early Warning Notice has been issued for the subject relays in Stone &
Webster's scope of supply with a service life of 4.5 years. The
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R. W. Starostecki l
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specific relays supplied through Stone & Webster have been itemized and a request for an itemized list of General Electric supplied relays has been made.
The replacement schedule will be part of a maintenance /
surveillance program that is to be provided prior to fuel load.
At that time, the equipment identified in the Early Warning Notices will be incorporated in the new program.
(55(e)-84-40 and 55(e)-84-42) Containment Purge System Isolation Valves As stated in our interim reports, Niagara Mohawk had anticipated completing investigations on the seismic / hydrodynamic loadings (55(e)-84-40) and valve closure during loss-of-coolant accident (55(e)-84-42) in time to provide' final responses by August 1,1985 and August 5,1985 respectively.
The initial work by the vendor (Posi-Seal International) has provided insufficient data to correlate the actual aerodynamic conditions at the containment ~ pressure of 45 psig with test results (55(e)-84-42).
Also, to confirm the adequacy of the valve, we must consider the combined effect of all
- loads, including the loss of coolant-accident blowdown loads, as well as the seismic loads per 55(e)-84-40.
Therefore, the results of the loss-of-coolant-accident loads analysis is needed to complete the analysis concerning seismic loadings. _ Stone &
Webster and Posi-Seal are presently developing - a schedule for
-completion of additional analysis.
The target date for
. submittal of final reports for both items is January 31, 1986.
(55(e)-84-46) Tricentric Valves Supplied by Clow Corporation Part of Item 2 of the corrective action called for an evaluation of. the 30-inch check valves.
To perform. the evaluation we require a. full system flow test.
Based on the present start-up and test schedule, the evaluation of the 30-inch check valves will be available by December 31, 1985.
The completion of the seismic analysis called for in Item 4 of the Corrective Action will be rescheduled to November 1, 1985.
This change is due to the complexity of modeling the applicable valves.
(55(e)-1982) Limitorque Motor Operators (Ref. letter from Gerald K.
Rhode (Niagara Mohawk) to R. W. Starostecki (Region I), dated June 30, 1982)
L 1
In order to maintain the as-qualified conditions and to prevent i
damage to the limit switch finger base, the 1/4 - 20 X 7/8 i
l
R. W. Starostecki Page 3*
- finger base mounting screws for Limitorque actuators are torqued to 50 in. - lb and not 100 in. - lb as originally stated in the referenced letter.
The manufacturer's manuals have been supplemented to identify these torque requirements.
If you require further details on any of the above items, please call Mr. G. Griffith of my staff.
(315-349-4791)
Very truly yours, C. V. Manga Senior Vice President CVM/GG/cla (ll80H) xc:
Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Senior Resident Inspector Project File (2)