ML17326A547
| ML17326A547 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/26/1980 |
| From: | Shaller D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | |
| References | |
| NUDOCS 8003050209 | |
| Download: ML17326A547 (6) | |
Text
REGULATO INFORMATION DISTRIBUTION TEM (RIDS)
ACCESSION NBR:8003050209 DOC ~ DATE: 80/02/26 NOTARIZED; NO DOCKET ¹ FACIL;50~316 Donald C.. Cook Nuclear Power Plantg Unit 2i Indiana, 8
05000316 AUTH'AME AUTHOR AFFILIATION SHAI LERiD,V, Indi anai 8, Michigan Elect r i c Co ~
REC IP ~ NAME REC IP IENT" AFFILIATION
SUBJECT:
Updates AEO 80 001/00X 0:on 800220Eunplanned re lease of Na 24 contaminated steam occurred. Investigation estimates total release of Na'>>24 was 2,38 E,"6 Ci at 0.11%
concentration: of Tech Spec
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DISTRIBUTION CODE:
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20 EFFL TR SYS AEOD 00 NSIC MAR 6 198O Q
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INDIANA5 MICHIGANELECTRIC COMPANY DONALDC. COOK NUCLEAR PLANT P.O. Box 468, Bridgman, Michigan 49106 (616) 466-6901 February 26, 1980 Mr. J.G. Keppler; Regional Director Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License. DPR-74 Docket No. 50-316 AEO No. 80-001/04X-0
Dear Mr. Keppler:
On February 20,
- 1980, a written report was sent to you describing an event which occurred at the Donald C.
Cook Nuclear Plant, Unit 2.
In that report it stated that after a manual trip on Unit 2 the power operated relief valves were opened for a short period of time causing an unplanned release of Sodium 24 (Na-24) contaminated steam.
Investigation has shown that the power operated relief valve on 84 Steam Generator (MRV-243) was open and passing 320,000 lbs./hr.
steam from 0250 to 0400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> on February 19, 1980 as read on recorder 2-MR-020.
The Na-24 in the steam generator was injected as part of a test being conducted on the moisture separator reheaters and laboratory analysis indicated that the concentration in the steam generator was 5.6 E-6 pCi/cc at the beginning of the release.
By calculation, the actual release concentration was 5.47 E-12 11Ci/cc Na-24.
The applicable Technical Specification limit from 10CFR20 Appendix B, Table II, Column I for Na-24 in air to an unrestricted area is 5.0 E-9 i1Ci/cc.
The total release was 2.38 E-6 Ci at a concentration which was 0.11 percent of the Technical Specification limit.
This occurrence had no effect on the health and safety of the public.
Sincerely,
~ D.V. Shaller Plant Manager
/bab cc:
See Attached Distribution COd3 SP i'008050+ gf
~
F: <<yi
Mr. J.G. Keppler February 26, 1980 Page 2 of 2 cc:
J.E.
Dolan R.S. Hunter R.W. Jurgensen R.F. Kroeger R. Kilburn R.E.
Masse RO:III R.C. Callen MPSC G. Charnoff, Esq.
J.M. Hennigan G. Olson W. Lavallee EPRI
<Dir, IE (20 copies)~
Df,r;, MIPC (2 copies)
Directorate of Licensing (1 copy)
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