ML20098F886
| ML20098F886 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 09/05/1984 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| CON-#484-738 157, OL, NUDOCS 8410030498 | |
| Download: ML20098F886 (3) | |
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2840811790 i
1 PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699
.i PHILADELPHI A. PA.19101 SEP 051984 (215)841 4502 JOHN 5. KEMPER
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,84 SEP 10 pl1 :39 Dr. Th m as E. Murley, Director Office of Inspection and Enforcement - Region I
.r-U. S. Nuclear Pegulatory Cm mission'
- M-631 Park Avenue 6
King of Prussia, PA 19406
Subject:
Limerick Generating Station, Units 1 & 2 Significant Deficiency Report No.157 (Attachment 1)
ASCO Solenoid Valves Installed on Velan Air Operated Valves NRC Construction Permit Nos. CPPR-106 and 107
Reference:
Telecon - J. P. Evans (PECo) to Jane Grant (USNRC),
dated 9/4/84 File:
QUAL 2-10-2 (SDR No.157)
Dear Dr. Murley:
In empliance with 10CFR50.55 (e), we are subnitting our Significant Deficiency Report concerning ASCO solenoid valves instelled on Velan air operated valve assemblies.
We trust that this satisfactorily resolves the item.
Please do not hesitate to contact us if further information is required.
Sincerely, f$d Copy to: Director of Inspection and Enforcement United States Nuclear Regulatory Ccmnission Washington, DC 20555
- 5. Chaudhary, Resident NRC Inspector (Limerick)
JNM/pdO9048403 Attachnent puoi?88"Ol883$a S
t-
s cc: Judge Lawrence Brenner (w/ enclosure)
Judge Peter A. Morris (w/ enclosure)
Judge Richard F. Cole (w/ enclosure)
Judge Christine M. Kohl (w/ enclosure)
Judge Gary J. Edles (w/ enclosure)
Judge Reginald L. Gotchy (w/ enclosure)
Troy B. Conner, Jr., Esq.
(w/ enclosure)
Ann P. Hodgdon, Esq.
(w/ enclosure) i Mr. Frank R. Romano (w/ enclosure)
Mr. Robert L. Anthony (w/ enclosure)
Ms. Maureen Mulligan (w/ enclosure) i Charles W. Elliott, Esq.
(w/ enclosure) l Zori G. Ferkin, Esq.
(w/ enclosure)
Mr. Thomas Gerusky (w/ enclosure)
Director, Penna. Emergency (w/ enclosure)
Management Agency Angus Iove, Esq.
(w/ enclosure)
David Wersan, Esq.
(w/ enclosure)
Robert J. Sugarman, Esq.
(w/ enclosure)
Martha W. Bush, Esq.
(w/ enclosure)
Spence W. Perry, Esq.
(w/ enclosure)
Jay M. Gutierrez, Esq.
(w/ enclosure)
Atomic Safety & Licensing Appeal Board (w/ enclosure)
Atomic Safety & Licensing Board Panel (w/ enclosure)
Docket & Service Section (w/ enclosure - 3 copies))
James Wiggins (w/ enclosure)
Timothy R. S. Campbell (w/ enclosure) d%
'. ~
2840811790 Limerick Generating Station, Units 1 & 2 Significant Deficiency Report No. 157-Concerning Misapplication of ASCO Solenoid Valves 1.0 Introduction This report concerns the inproper application of ASCO Solenoid valves controlling air supply to Velan air operated valves in the Limerick Dnergency Service Water System.
2.0 Description of Problem The existing pilot solenoid valves (ASCO Model NP344A71E) are four way valves incorporating a design that provides the capability to control double acting valve operators (i.e.
.ones not provided with spring return to a designated position). h air supply to these pilot solenoids does not ensure ocuplete travel of the solenoid valve piston thus permitting partial venting to the atmosphere of the air supply to the valve operator. As a result, the subject valves occasionally do not stroke when called upon to do so, as was discovered during pre-operational testing.
3.0 Corrective Action to be Taken The four way solenoid valves on all Dnergency Service Water valves are being replaced by three way solenoid valves which will not be subject to the condition described'above, h manual shutoff valves upstream of the pilot solenoid valves are also being replaced to increase air supply flow. The affected ESW valves will be tested to verify proper operation after the work is emplete. 'Ihis work will be emplete by Septaber 15, 1984.
4.0 Safety Inplications Failure of pilot solenoid valves to stroke the ESW valves could result in loss of emergency service water inventory and/or loss of tM required cooling water to safety related ECCS heat exchangers.
JNM/pdO9048404 l
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