ML20249B535
| ML20249B535 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/21/1976 |
| From: | Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-76-107, NUDOCS 9806230275 | |
| Download: ML20249B535 (1) | |
Text
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aune u , As/o g (4L Q w * *e PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-76-10 7 This preliminary notification constitutes EARLY notice of an event of - .
POSSIBLE safety or public interest significance. The information !
presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.
Facility: Mi .lstone Point 2 (DN 50-336) 1
Subject:
ADMINISTRATIVELY IMPOSED LIMIT ON REACTOR POWER Ef*fective June 21, 1976 the licensee intends to administrative 1y limit reactor power to 70 per cent. This is being done to eliminate inadvertent I
steam releases to the atmosphere, which are annoying the local populace i due to the high noise level.
The steam releases occur indirectly as a result of inadvertent control l rod drops, which have been frequent over the past thirty days. The control rod drops cause a turbine runback which results in a power mis-l match. The power mismatch causes the steam safety valves to release to atmosphere. '
l l The control rod drop problem is being investigated by the licensee. It i l appears to be caused by component failures in the rod drive control l
[, system. A design change is planned.
i:
, Media interest is expected because of the power restriction and its association with a control rod problem. The State of Connecticut has been informed. A press release is planned by the licensee.
Region I, NRC, Philadelphia, PA received notification of this occurrencepd by telephone from the Unit Superintendent at 12:00 noon, June 21, 1976. _
j
Contact:
FADreher, IE x27261 GWRoy, IE x27261 DThompson, IE x27541 Distribution: O Chairman Rowden Commissioner Mason S. J. Chilk, SECY d
, Commissioner Gilinsky C. C. Kammerer, CA G. F. Murphy, JCAE Commissioner Kennedy 3
L. V. Gossick, EDO E. Volgenau, OIE J. A. Harris, PA l
B.,C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA K. R. Chapman, NMSS H. K. Shapar, ELD l Transmitted: PBldg) ; H St*k ; MNBB) ; Luge jg ;
PRELIMINARY NOTIFICATION f I l l ,'
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I S 9806230275 760621 PDR I&E PNO-76-107 PDR
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