ML17326A517

Ro:On 800219,unplanned Release of N-24 Steam Occurred. Caused by Opening of Power Operated Relief Valves Following Manual Trip.Concentration of Sodium Released Was Less than 1% of Authorized Limits.Followup Rept by 800229

ML17326A517
Person / Time
Site:	Cook
Issue date:	02/20/1980
From:	Shaller D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
References
NUDOCS 8002260647
Download: ML17326A517 (2)

Text

o'o orlaon loatrla INDIANA & MICHIGANEIE'CTRIC CDMPANY DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 (616) 465-5901 February 20, 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

Dear Mr. Keppler:

This is to confirm our verbal report to NRC Region IIX Inspector, Mr. R. E. Masse, at 1535 hours0.0178 days <br />0.426 hours <br />0.00254 weeks <br />5.840675e-4 months <br /> on February 19, 1980.

At that time we reported that after a manual trip on Unit 2 the power operated relief valves were open for a short period of time causing an unplanned release of Sodium 24 (Na-24) steam. Calculations performed by members of our plant Technical Department showed the concentration of Na-24 to be less than 1% of the limits identified in 10CFR20, Appendix B, Table 2, Column l.

A followup report will be submitted by February 29, 1980, as required by Appendix B, Technical Specification Section 5.4.2.1.

Sincerely, D. V. Shaller Plant Manager

/gas cc: J. E. Dolan J. M. Hennigan R. S. Hunter W. Lavallee EPRI R. W. Jurgensen PNSRC R. F. Kroeger J. F. Stietzel R. W. Kilburn E. L. Townley R. E. Masse RO:III Dir., IE (20 copies) coo3 R.

G.

C. Callen MPSC Charnoff, Esq.

G. Olson Dir., MIPC (2 copies)

Directorate of Licensing C~5 Pp8.22 1988 F~22& C49 7

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