05000344/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

ML20010F553
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	08/27/1981
From:	Yundt C PORTLAND GENERAL ELECTRIC CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010F554	List: 05000344/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl 05000344/LER-1981-017-03, /03L-0:on 810731,after Increasing Level in C SI Accumulator by 11%,boron Concentration Not Verified within 6-h,per Tech Spec.Caused by Personnel Error.Sample Taken Upon Discovery.Importance of Sample Stressed to Personnel
References
CPY-610-81, NUDOCS 8109100344
Download: ML20010F553 (2)

LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3441981017R00 - NRC Website

text

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Portland General Electric Company 2

o Trojan Nuclear Plant P.O. Box 439 Rainier. Oregon 97048 EEd'*' S'"

(503) 556 3713 August 27, 1981 CPY-610-81

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Mr. R. H. Engelken Director Y

Nuclear Regulatory Commission, Region V (f

SEP 0 9193y, 1990 N. California Blvd.

Walnut Creek, CA 94596-3783

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Dear Sir:

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In accordance with the Trojan Plant Operating License, Ap.

US NRC Technical Specifications, Paragraph 6.9.1.9.c, attache s

Licensee Event Report No. 81-17, concerving a situation where "C" SI accumulator was not sampled for boron coacentration after increasing its level by 11%. This could have led to a possible reduction in shutdown capability on ESF actuation. Technical Specification Paragraphs 3.5.1.c and 4.5.1.b require sampling the SI accumulators within six hours of increasing the liquid volume by 1% of tank volume to verify that the boron concentration is greater than 1900 ppm.

This is a 30-day reportable occurrence.

Sincerely, C. P. Yundr General Manager CPY/ LAW:na Attachments c: LER Distribution List

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8109100344 810827 PDR ADOCK 05000344 S

PDR

REPORTABLE OCCURRENCE 1.

Report No.:

81-17 2.

a.

Report Date:

August 27, 1981 b.

Occurrence Date: July 31, 1981 3.

Facility: Trojan Nuclear Plant, PO Box 439. Rainier, OR 97048 4.

Identification of Occurrence:

Af ter increasing level in "C" SI accumulator by 11%, the boron concentration was not verified within six hours as required by Technical Specification 4.5.1.b.

5.

Conditions Prior to Occurrence:

1 l

The plant was at 80% power, steady-state operation with an average RCS temperature of 578'F, pressurizer pressure of 2238 psig, and four RCPs running.

1 l

6.

Description of Occurrence:

On August 1, 1981, a review of the Operations Log indicated no boron concentration for "C" SI accumulator had been logged af ter filling the accumulator on July 31, 1981. The previous sarv,' s was taken on July 30, 1981. After increasing level by 11% from tzra RWST, the operator notified Chemistry to draw a boron sample. The request was apparently not transferred to the oncoming shift and no concen-tration was logged.

7.

Designation of Apparent Cause of Occurrence:

Plant Review Board minutes classified the cause as " observed l

inadequacy in implementation of administrative controls." This occurrence was caused by personnel error. The Chemistry and Operations Departments failed to follow up on the request for a sample to verify that the sample had been obtained.

8.

Analysis of Occurrence:

Since the accumulator was filled f rom the RWST (boron concentration greater than 2000 ppm) and samples taken before and after filling indicated boron greater than 2100 ppa, the plant was not operated in a degraded mode.

9.

Corrective Action

A sample was taken immediately upon discovery of the occurrence 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and 38 minutes after filling the accumulator. The import-ance of ensuring that the requested sample is received and logged has been stressed to plant personnel.

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