ML20137T505
| ML20137T505 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/06/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-6-013, 2NRC-6-13, 86-01, 86-1, NUDOCS 8602180372 | |
| Download: ML20137T505 (3) | |
Text
l 13
'Af Duquesne Lidit "m6-oJ3
- 12) 92N 960 Nuclear Construction Division
- pi,6i,q,"'*'*is9ggino 2. suite rio j',{rEah'6, eu 1986 p
United States Nuclear Regulatory Conmission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thanas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Potential Significant Deficiency Report 86-01 Gentlemen:
This Potentially Reportable Significant Deficiency Report relating to improperly rated cables tenninated in solenoid valves is being submitted pursuant to the requirenents of 10CFR50.55(e).
This is a final report.
It is. anticipated that no additional reports will be submitted.
DUQUESNE LIGHT COMPANY By h
J. J. Carey v
Vice President GH0/wJs Attachmt it cc:
Mr. P. Tam, Project Manager (w/a)
Mr. J. M. Taylor, Director (3) (w/a)
Mr. G. Walton, NRC Resident Inspector (w/a)
INP0 Records Center (w/a)
NRC Docunent Control Desk (w/a) ft1 8602180372 860206 PDR ADOCK 05000412 g
S PDR l
1 BEAVER VALLEY POWER STATION - UNIT NO. 2
+
DUQUESNE LIGHT COMPANY Potential Significant Deficiency Report 86-01
" Improperly Rated Cables Tenninated in Solenoid Valves" 4
1.
SUMMARY
Internal heat rise for solenoid valves under continuous use may exceed the tenperature rating of field cables tenninated within the solenoid housing.
2.
IMMEDIATE ACTION TAKEN Upon discovery of this concern, the BVPS-2 project initiated efforts to determine the extent of the problen and possible solutions.
On January 21, 1986, Mr.
S.
D.
Hal l, Senior Conpliance Engineer, DLC Regul atory Af f airs Department, notified Mr. Dave Johnson, NRC Region I, of this potentially reportable deficiency in accordance witn.10CFR50.55(e).
3.
DESCRIPTION'0F THE DEFICIENCY Solenoid valves that are continuously energized, or energized for i
extended periods of time, have an internal tenperature rise that may cause the tenperature of field-run cable inside the solenoid valve housing to exceed the cable's thennal rating of 90*C.
The valve manu-f acturer did not consider or address the potential for attaining high temperatures within the solenoid housings.
i 4.
ANALYS_IS OF SAFETY IMPLICATION Tne field installed cables tenninated at the solenoid valves do not have a tenpe'rature rating sufficient for~ all possible environnental condi-tions.. A cable insulation breakd_own caused by excessive tenperatures could prevent safety-related valves fron operating properly.
5.
CORRECTIVE ACTION TO REMEDY DEFICIENCY Stone & Webster Engineering Corporation has reviewed the following purchase orders involving solenoid valves:
2BV-001, 2BV-185, 2BV-651, 2BV-666A, 2BV-718, and 2BV-719. Only purchase order 2BV-719 (Target Rock Solenoids) is affected by this potentially deficient condition.
[
- The Target Rock solenoid valves supplied under 2BVS-719 that are continu-ously energized or anergized for extended periods of time will be rewired in the followi ng manner wi th high tenperature cable purchased under 2BV-326:
(1) for cases where there is a junction box within 10 feet of the solenoid, high tenperature cable will be rewired to the junction box; (2) for cases in which a junction box is not located in close proximity to the solenoid valve, a new junction box will be installed and high temperature cable will be installed to the new junction box.
The aDove corrective actions are further detailed in ACN-E-158, and will be completed in accordance with systen turnover schedule requireaents.
a n,
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p.
I,,
A review perfonned by the Westinghouse - Electric Corporation detennined that no. solenoid valves purchased under the Westinghouse sc. ope of supply i
are affected by the subject deficiencies.
~
6.
ADDITIDNAL REPORTS This is the final. report on the potential significant deficiency regard-ing improperly rated cable tenninated in' solenoid valves.
It is antici-pated that no additional reports will be submitted.
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