ML20084D099
| ML20084D099 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/13/1984 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-4-040, 2NRC-4-40, 84-05, 84-5, NUDOCS 8405010187 | |
| Download: ML20084D099 (3) | |
Text
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=v 2NRC-4-040 (412)787-5141 Telecopy Nuclear Construction Division Apcil 13, 1984 Robinson Plaza, Building 2, Suite 210 Pittsburgh, PA 15205 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley Administrator l
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Misapplication of Solenoid Operated Valves in Cert ain Cont'ain-ment Isolation Applications Significant Deficiency Report No. 84-05, Interim Report Gentlemen:
This Interim Report - is in reference to the repo rt ab le Significant Deficiency relating to the " Misapplication of Solenoid Operated Valves in Certain Containment Isolation Applications.
Pursuant to the requirements of 10CFR50.55(e), it is anticipated that a subsequent report on this matter l
will be submitted to Region I by July 1,1984.
DUQUESNE LIGHT COMPANY By -
F. J! Woolever Vice President
, RW/wjs At tachment
-cc:
Mr. R. DeYoung, Director Of fice of Inspection and Enforcement (3) (w/ attachment)
Mr. G. Walton, NRC Resident Inspector (w/ attachment)
Mr I. Lacitra, NRC Project Manager (w/ attachment)
NRC Document Control Desk (w/ attachment)
INPO Records Center (w/ attachment)
SUBSCRIBED AND SyORN TO BEFORE ME THIS
/J/( DAY OF
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,. 1984.
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m) x Notary Public 8405010187 e40413 f
ANITA ELAINE REITER, NOTARY PUBUC PDR ADOCK 05000412
'1 ROBINSON TOWNSHIP, ALLEGHEljY COUNTV S
PDR NY COMMISSION EXPIRES OCTOBER 20,1986
United States Nuclear Regulatory Commission Dr. Thomas E. Murley page 2 COMMONWEALTH OF PENNSYLVANIA )
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SS:
COUNTY OF ALLEGHENY
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On this
/8I day of
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, befo re me,
a Notary Public in and fo r sai[ Commonwealth and County, pe rsonal ly appeared E. J. Woolever, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execut e and file the fo regoing S ubmit t al on behalf of said Company, arvi (3) the statements set fo rt h in the S ubmit t al are true and correct to the best of his knowledge.
4 A.
74 Notary Public ANITA ELAINE REITER, NOTARY PUBLIC ROBINSON TOWNSHIP, ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986 y
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BEAVER VALLEY POWER STATION - UNIT NO. 2 DUQUESNE LIGHT COMPANY Report on Significant Deficiency No. 84-05 Misapplication of Solenoid Operated Valves in Certain Containment Isolation Applications 1.
SUMMARY
In-line Target Rock solenoid operated valves used in containment iso la-t ion ap plica t ions may open when downs tr eam pressure increases ab ove upstream pressure allowing flow in the direction opposite of normal.
2.
IMMEDIATE ACTION TAKEN Stopwork E&DCR 2PH-0090 was written to stop work on al l af fect ed solenoid valves.
On March 14, 19 84, Mr. S. D. Hall, Acting Manager of Duquesne Light Company's Regulatory Af fairs Department, not ified Mr. R.
Keimig of the NRC Region I Of fice of this reportable deficiency.
3.
DESCRIPTION OF THE DEFICIENCY The _in-line Target Rock solenoid valves utilized on Beaver Valley Power Station, Unit 2 (BVPS-2), were ident ified to be sens itive to changes in pressure di f ferent ial, such that an increase in downs tr e am pres sur e above upstream pressure may allow flow in the opposite direction.
4.
ANALYSIS OF SAFETY IMPLICATIONS Buildup of downstream pres sure ab ove upstream pres sure may cause con-t ainment isolation SOV's to open during a Design Basis Accident, break-ing containment isolation.
5.
CORRECTIVE ACTION TO REMEDY DEFICIENCY Beaver Valley Power Station Unit 2 is currently reviewing and eval u-ating each system application of these solenoid operated valves.
6.
ADDITIONAL REPORTS An addit ional repo rt on this Significant Deficiency will be submit ted by Duquesne Light Company by July 1,1984.
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