ML20085F420

AO AO-75-5:on 750411 Unsampled South Filtered Waste Tank W/Laundry Waste Released.Caused by Use of Wrong Batch Card. Tank Release Terminated Until Appropriate Analysis Could Be Made

ML20085F420
Person / Time
Site:	Palisades
Issue date:	04/11/1975
From:	Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20085F425	List: ML20085F420 ML20085F427
References
AO-75-5, NUDOCS 8308220083
Download: ML20085F420 (3)

Text

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/6*~ ::.y Consumers l V (oRygrjfs Power Company

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Division of Reactor Licensing Re: Docket 50-255 US Nuclear Regulatory Commission License DPR-20 Washington, DC 20555 Palisades Plant A0-75-5 Gentlemen:

Attached is Abnormal Occurrence Report A0-75-5 which covers the release of a small quantity of unsampled liquid vaste. Post-analysis disclosed that approximately 288 gallons were released at a release rate of 1 7% of the allovable limit.

Yours very truly, Ralph B. Sewell (Signed)

DAB /mel Ralph B. Sewell Nuclear Licensing Administrator CC: JGKeppler, USNRC Tb-? y11 LI V O 26 8308220083 750411 PDR ADOCK 05000255 PDR S

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O O O ABNORMAL OCCURRENCE REPORT Palisades Plant

1. Report Number: A0-75-5, Docket 50-255 o

2. a. Report Date: April 11, 1975

b. Occurrence Date: April 1, 1975 3 Facility: Palisades Plant, Covert, Michigan.

4. Identification of Occurrence: Release of unsampled south filtered waste tank, laundry waste, T-63 5 Conditions Prior to Occurrence: Hot standby.

6. Description of Occurrence: On April 1, 1975 at 1726 an operator started the release of the south filtered waste monitor tank which was full of laundry waste as authorized by batch card Analysis 75-018-L. As he was filling out the batch card, he noticed a 6% difference between the actual tank level and the level indicated on the batch release. He stopped the batch release after approximately 10% had been released. A request for a tank analysis was made prior to further release.

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, k., 7 Apparent Cause of Occarrence: Two separate analyses were inadvertently run for the contents in the south filter vaste tank. One of these analyses and the associated batch card was used to properly discharge the contents of the tank. The tank was then refilled and a release of its contents was begun using the (second) analysis and associated batch card which had been run for the tank's previous contents.

8. Analysis of Occurrence: A sample analysis was made on the 72% remaining in the t3nk. This analysis showed that approximately 288 gallons were re-leased w,'.th an activity of 2.49E-03 micro curies per ml and at a rate of about 1.7% of the allowable limit. No 1Lnits of 10CFR20 were violated.

9 Corrective Action:

a. The tank release was terminated until an appropriate analysis could be made.

b. The present occurrence will be reviewed with members of the operating staff.

c. The batch card will be revised to add the following requirements:

(1) A Radiological Materials Control group verification that the smnple analysis is for the tank contents to be discharged.

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O O O 9 Corrective Action: (Contd)

c. (Contd)

(2) An operator verification (through logbook inspection) that the tank contents for which the batch card has been initiated is the same as that to be released.

(3) An operator check to verify proper tank level prior to release of the tank contents.

10. Failure Date: There was a previous occurrence reported on A0-28-714 Ilovever, this occurrence was caused by an RMC technician transposing error.

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