05000395/LER-1983-021, Forwards LER 83-021/03L-0.Detailed Event Analysis Encl

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Forwards LER 83-021/03L-0.Detailed Event Analysis Encl
ML20073C651
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 04/06/1983
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20073C657 List:
References
NUDOCS 8304130246
Download: ML20073C651 (2)


LER-2083-021, Forwards LER 83-021/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952083021R00 - NRC Website

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vice pnesiosur &,/ 0g g NucLEAn OPERArioNS April 6, 1983 8,. g Mr. James P. O'Reilly Regional Administrator U.S. Nuclear Regulatory Commission Region II, Suite 2900 101 Marietta Street, N.W.

Atlanta, Georgia 30303

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 83-021

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-021 for Virgil C.

Summer Nuclear Station. This Thirty Day Report is required by Technical Specification 6.9.1.13.(b) as a result of entry into Action Statement (b) of Technical Specification 3.3.3.8, Table 3.3-12, Item 1(c), " Radioactive Liquid Effluent Monitoring Instrumentation," on March 7, 1983.

Should there be any questions , please call us at your convenience.

Very truly yours, a

V /

O. W. xon, c.

HCF:0WD/dwr Attachment ec: - V. C. Summer G. J. Braddick T. C. Nichols, Jr.,/0. W. Dixon, Jr. J. C. Miller E. C. Roberts J. L. Skolds H. N. Cyrus J. B. Knotts, Jr.

Group / General Managers I&E (Washington)

O. S. Bradham Document Management R. B. Clary Branch C. A. Price INPO Records Center A . R. Koon NPCF File (Lic./Eng. )

D. A. Lavigne C. L. Ligon (NSRC)

"oi:FICI AL COPY 8304130246 830406 DR ADOCK 05000 GAS

/

Mr. James P. O'Reilly LER No.83-021 Page Two-April 6, 1983 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES On March 7,1983, with the Plant operating in Mode 1, Steam Generator Blowdown Radiation Monitor, RM-L3, failed low with back-up monitor, RM-L10, having been previously removed from service. The failure reduced the number of operable channels to less than the minimum number as required in Table 3.3-12, Item 1(c), of Technical Specification 3.3.3.8.

As RM-L3 and RM-L10 both monitor steam generator blowdown effluent prior to its release, Health Physics was notified to perform grab samples in accordance with the applicable Technical Specification Action Statement. No adverse consequences resulted from the event.

CAUSE AND' CORRECTIVE' ACTIONS RM-L10 was removed from service on March 3,1983, due to problems experienced with its <?tector. During this period, RM-L3 remained operable.

Prior to the investigation of the RM-L10 failure, an overhead sample valve, IAP-4714, ruptured an o-ring and caused both -RM-L10 and RM-L3 (which are physically located adjacent to each other) to be sprayed upon. Subsequently, RM-L3 failed low. Investigation revealed moisture accumulation on the detectors of both monitors.

Corrective action was taken to replace the detectors for both monitors.

RM-L3 and RM-L10 were returned to operable status on March 8, 1983, and. March 11, 1983, respectively, after satisfactory completion of the applicable surveillance test.

To. prevent recurrence of this event, the sample valve was plugged and replacement parts were ordered. The -valve will be repaired upon receipt of the replacement parts.

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