05000395/LER-1983-029, Forwards LER 83-029/03L-0.Detailed Event Analysis Encl

Forwards LER 83-029/03L-0.Detailed Event Analysis Encl

ML20069L227
Person / Time
Site:	Summer
Issue date:	04/20/1983
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20069L228	List: 05000395/LER-1983-029, Forwards LER 83-029/03L-0.Detailed Event Analysis Encl 05000395/LER-1983-029-03, /03L-0:on 830320,w/reactor Bldg Purge Initiated, Radiation Monitor RM-A4 Read Higher than Normal Pump RM-A4 & Detector Secured to Change Filter,Leaving Purge Unmonitored for 5 Minutes.No Activity Released During Event
References
NUDOCS 8304280108
Download: ML20069L227 (2)

LER-1983-029, Forwards LER 83-029/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3951983029R00 - NRC Website

text

r SOUTH CAROUNA ELECTRIC & GAS COMPANY POST OPPICE 764 t

COLuenslA. SOUTH CAROUNA 29218 g

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r O. W. DIXON, JR.

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Mr. James P. O'Reilly it,.

Regional Administrator

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JU.S. Nuclear Regulatory Commission r*

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 83-029

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-029 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 3.3.3.9,

" Radioactive Gaseous Ef fluent Monitoring Instrumentation," Table 3.3-13, Item 4(a), on March 20, 1983.

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

Very truly yours, O. W. D xon, J HCF:OWD/dwf/fjc Attachment cc:

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C.

Summer G. J. Braddick l

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C. Nichols, Jr.,/O. W. Dixon, Jr.

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C. Miller i

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C. Roberts J.

L. Skolds J. B. Knotts, Jr.

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Cyrus I&E (Washington)

Group / General Managers O. S. Bradham Document Management Branch

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Price INPO Records Center NPCF l

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R. Koon File (Lic./Eng.)

D. A. Lavigne C.

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Mr. James P.

O'Reilly LER No.83-029 Page Two April 20, 1983 DESCRIPTION, CAUSE AND PROBABLE CONSEQUENCES On March 20, 1983, a Reactor Building purge was initiated per release permit (CP-83-002) at approximately 2235 hours0.0259 days <br />0.621 hours <br />0.0037 weeks <br />8.504175e-4 months <br />.

The Plant

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was in Mode 5 with both the equipment and personnel hatches open.

At approximately 2350 hours0.0272 days <br />0.653 hours <br />0.00389 weeks <br />8.94175e-4 months <br />, Control Room personnel notified the Count Room that RM-A4, Reactor Building Purge System Radiation Monitor, particulate channel was reading higher than normal.

On

~ March 21, 1983, at approximately 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, the RM-A4 pump and detector were secured to change out -the filter.

The purge remained in progress.

At approximately 0035 hours4.050926e-4 days <br />0.00972 hours <br />5.787037e-5 weeks <br />1.33175e-5 months <br /> on March 21, 1983, the RM-A4 pump and detector were returned to service upon completion of the filter change out.

The purge was unmonitored for approximately five (5) minutes.

Technical Specification 3.3.3.9,-" Radioactive Gaseous Effluent Monitoring Instrumentation," Table 3.3-13, Item 4 (a), requires RM-A4 to be operable during purging operations.

There was no adverse consequence as a result of the event.

A spectroscopic analysis of RM-A4 particulate and iodine filters revealed no detectable radioactivity other than natural background levels from natural radon daughters.

The cause of the high reading is attributed to particulate accumulation on the filter.

Prior to the CP-83-002 release, the RM-A4 gaseous channel showed a stable 125 cpm.

Several hours after the termination of the purge, RM-A4 still showed 125 cpm, thus indicating that essentially no activity _was released during the event.

CORRECTIVE ACTIONS

A Station Memorandum has been issued to appropriate plant personnel in an effort to increase the awareness level of the required operability of RM-A4 during purge operation per Technical Specification.