ML20085F536
| ML20085F536 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 12/26/1974 |
| From: | Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20085F537 | List: |
| References | |
| AO-28-74, NUDOCS 8308220417 | |
| Download: ML20085F536 (2) | |
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General Offices 212 West Machigan Avenue, Jackson Michigan 49201. Area Code 517 788-0550 December 26, 1974
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Directorate of Licensing
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Re: Docket 50-255 US Atomic Energy Commission lh'~i7 License DPR-20
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Palisades Plant Washington, DC 20545 A0-28-Th Gentlemen:
Attached is Abnormal Occurrence Report A0-28-Th which covers the improper release of a laundry waste tank. Post-analysis of the release showed that it was within acceptable limits.
Yours very truly, Ralph B. Sewell (Signed)
DAE/ce Ralph B. Sewell Nuclear Licensing Administrator CC: JGKeppler, USAEC l
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l 13093 8308220417 741226 PDR ADOCK 05000255 S
PDR hCOPyrSENT REGION 2
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ABNORMAL OCCURRENCE REPORT Palisades Plant 1.
Report No: A0-28-74. Docket 50-255 2a.
Report Date:
December 26, 1974 2b.
Occurrence Date: December 15, 1974 3
Facility: Palisades Plant, Covert, Michigan 4.
Identification of Occurrence: Release of north filtered waste tank, laundry waste, without prior sampling.
5 Conditions Prior to occurrence: The reactor was in cold shutdown.
6.
Description of Occurrence: on 12-14-74 at 1420 the south filtered waste tank containing laundry waste was placed on recycle for analysis.
On 12-15-74 at 08h5 ohe chem lab sampled the tank, analyzed it, and gave the data to the RMC Department. The RMC technician transferred the data to the batch release form and calculated the release. On 12-15-7h at 2329 the operator released the north filtered waste tank also containing laundry waste as authorized by Batch Th-073-L. The release should have been the south filtered waste tank.
7 Apparent Cause: Technician / operator error, i
8.
Analysis of Occurrence: The RMC technician when transposing the data to the batch card Th-073-L wrote down the wrong tank identification.
He wrote down the north filtered waste tank, T63A, instead of the south filtered waste tank, T63B. The-south tank level was at 92 per-cent. The north tank level was at 81 percent. Operating Procedure B17.3.h should have noted this difference.
RMC Procedure hA, Part 1.2, was also violated. The cause for the wrong tank being released was in transposing the data. No safety limits were violated as neither the 4
monitor used for released. RlA 1049, nor the final circulating water monitor alarmed during the release. The RlA 1049 alarm was set based on the south filtered waste tank analysis. A sample of the water re-maining in the north tank was analyzed for activity, and a comparison made to the south tank analysis. No sigaificant differences were found.
The total activity released was detennined and accounted for based on the remaining water sample. The total release amounted to 12.065 mil-licuries.
9 Corrective Action: A review of RMC procedures was held with the RMC technician, since the primary cause was in his transposing the wrong tank number from the analysis sheets to the release form.
A review of the incident will be conducted with the operators involved.
10.
Failure Data: Not applicable.
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