05000369/LER-1981-083, Forwards LER 81-083/01T-0.Detailed Event Analysis Encl

Forwards LER 81-083/01T-0.Detailed Event Analysis Encl

ML20009F718
Person / Time
Site:	McGuire
Issue date:	06/05/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F719	List: 05000369/LER-1981-083, Forwards LER 81-083/01T-0.Detailed Event Analysis Encl 05000369/LER-1981-083-01, /01T-0:on 810522,while in Mode 5 Initial Fuel Loading Radiation Monitor EMF-49 Was Inoperable During Liquid Waste Release.Release Was Terminated & Inadvertantly Restarted.Caused by Misinterpretation of Directions
References
NUDOCS 8107310453
Download: ML20009F718 (3)

LER-1981-083, Forwards LER 81-083/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
3691981083R00 - NRC Website

text

,o DUKE POWER COMPANY l' '

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June 5, 1981 ruc ~o,e E:AnEA 704 srca Paeoverio=

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Mr. J. P. O'Reilly, Director

.y U. S. Nuclear Regulatory Commission g

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6 hD L.U 101 Marietta Street, Suite 3100 JUL. 0198) &

Atlanta, Georgia 30303 T

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Re: McGuire Nuclear Station Unit 1 g..

Docket No. 50-369 M

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Dear Mr. O'Reilly:

Please find attached Reportable Occurrence Report R0-369/81-83.

This report concerns a liquid wr.ste release initiated in violation of a Technical f pecification Action Statement. This incident was considered to be of no significance with respect to the health and safety of t'ae public.

Very truly yours, 7

William O. Parker, Jr.

RWO/djs Attachment ec: Director Mr. Bill Lavalee Office of Management and Program Analysis Nuclear Safety Analysis Center U. S. Nuclear Regulatory Commission Post Office Box 10412 Washington, D. C.

20555 Palo Alto, ca.'.ifornia 94303 Ms. M. J. Graham Resident Inspector-NRC l

McGuire Nuclear Station hl 8107310453 810605 PDR ADGCX 05000369 S

PDR

e McGUIRE NUCLEAR STATION INCIDENT REPORT

_ REPORT NUMBER:

81-83 REPORT DATE: June 5, 1981 OCCURRENCE DATE: May 22, 1981 FACILITY: McGuire Unit 1, Cornelius, N.C.

IDENTIFICATION OF OCCURRENCE: A liquid waste release (LWR) was initiated in violation of a Technical Specification Action Statement.

CONDITIONS PRIOR TO OCCURRENCE: Mode 5, Prior to initial criticality.

DESCRIPTION OF OCCURRENCE: On May 22, 1981, personnel were preparing to release the contents of Waste Monitor Tank (WMT)

'B' thru EMF-49 (liquid radwaste discharge menitor). A sample was taken and analyzed and the tank release was initiated at 1425 hours0.0165 days <br />0.396 hours <br />0.00236 weeks <br />5.422125e-4 months <br />. At the beginning of the release, it was discovered that the rad monitor EMF-49 bypass valve (lWM-245) was broken and could not be used (throttled) to control the flowrate thru EMF-49. Con-4 e<

v, F-49 was daclared inoperable which required going to Action

,of Technical Specification 4.3.3.8.

A second sample was taken S

as uured, but the release was restarted before the sample analysis was

.s complete. This was in violatien of Action Statement 28 of Tech. Spec.

i 4.3.3.8 and thus reportable pursuant to Tech. Spec. 6.9.1.12b.

APPARENT CAUSE OF OCCURRENCE: A technician misinterpreted the directions of a rapervisor and restarted the liquid waste release (LWR) before the sample analysis was complete. Also, the HP procedure which requires that two samples be analyzed prior to a LWR when EMF-49 is inoperable was not used.

ANALYSIS OF OCCURRENCE: Personnel were preparing to release the contents of WMT 'B' (98% full) using the operating procedure, Radwaste Procedure for Discharging a Waste Monitor Tank. After EMF-49 was declared inoperable and a second sample was drawn and taken to the HP lab for analysis, a eupervisor was notified of the problem.

Due to the noise of surrounding cquipment, the technician misinterpreted the supervisor's instructions and restarted the release before the second sample analysis was complete.

The supervisor telephoned the technician a short while later to verify that the release had not yet started and the release was terminated.

The health physics procedure requires that two samples be taken and analyzed prior to a LWR if EMF-49 is inoperable. However, the technician assisting the other technician did not have a copy of this procedure since he didn't know it would be needed when the release was first initiated. A work

(

request was written to repair lWM-245 and on May 23, WMT 'B' was released using the normal flowpath thru EMF-49.

This release was performed under LWRT-96.

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SAFETY ANALYSIS

Since there was only new fuel in th2 cora, thira was no radioactive liquid waste in Waste Monitor Tank

'B'.

Thus, safe plant cperation and the haalth and safety of the public were not affected.

If this incident occurred during normal operation, the health and safety of the public would not be affected if the initial sample is analyzed correctly.

The purpose of the second sample is to ve'ify the results of r

the first sample.

CORRECTIVE ACTION

A work request was written to repair lWM-245. The sampling procedure for an inoperable EMF will be listed in the ' Limits cnd Precautions' sections of the procedure for LWR, and the Radwaste Prc:edure for Discharging a WMT.

O