ML19330A979

Forwards Safety Evaluation Re 800226 Incident.Corrective Actions Taken Are Sufficient to Permit Restart & to Ensure Safe Operation

ML19330A979
Person / Time
Site:	Crystal River
Issue date:	07/18/1980
From:	Reid R Office of Nuclear Reactor Regulation
To:	Hancock J FLORIDA POWER CORP.
Shared Package
ML19330A980	List: ML19330A979 ML19330A982
References
TAC-12961, NUDOCS 8007290874
Download: ML19330A979 (2)

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UNITED STATES e

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July 18,1980 Docket No. 50-302 Mr. J. A. Hancock Director, Nuclear Operations Florida Power Corporation P. O. Box 14042,-Mail Stop C-4 St. Petersburg, Florida 33733

Dear Mr. Hancock:

We have reviewed the corrective actions taken by Florida Power Corporation since the February 26, 1980 incident at the Crystal River 3 Station. This incident was initiated by a power failure in a portion of the non-nuclear instrumentation ('NNI) system and resulted in a reactor and turbine trip, discharge of primary coolant into the Reactor Building, decreased feedwater flow to the steam generators, actuation of the engineered safety features and loss of control panel indication. The NNI power was restored in about 22 minutes through operator action. After 41 minutes, you declared a Class "B" Emergency. No radiation was released from the containment. The emergency status was lifted about three and one half hours later. You submitted your list of 51 proposed corrective actions by letter dated May 2,1980.

Item 51 in the May 2,1980 letter dealt with a reevaluation of the once-through steam generator Rupture Matrix with the intent to remove the isolation sig-nal from certain feedwater valves. We were informed by your staff that the analyses related to the change will not be completed until after CR-3 restarts.

We have concluded that implementation of this proposed change may be deferred until af ter restart of the reactor pending completion of the review by you and the NRC staff.

Based on our review, in the enclosed Safety Evaluation, we conclude that the corrective actions taken by Florida Power Corporation are sufficient to permit restart of Crystal River 3 and to ensure operation in a safe manner during the interim period until the long term requirements resulting from the Three Mile Island Unit 2 accident and those of OIE Bulletin 79-27 are all implemented.

Sincerely,

~<

Robert W. Reid, Chief Operating Reactors Branch #4 Division of Licensing

Enclosure:

Safety Evalua ' ion cc w/ enclosure:

See next page 00 @ 9 8

Crystal River-3 50-302 Florida Power Corporation cc -/ enclosure (s):

Mr. S. A. Brandimore Mr. Robert B. Borsum Vice President and General Counsel Babcock & Wilcox P. O. Box 14042 Nuclear Power Generation Division St. Petersburg, Florida 33733 Cuite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Mr. Wilbur Langely, Chairman Board of County Commissioners Citrus County Iverness, Florida 36250 Bureau of Intergovernmental Relations U. S. Environmental Protection Agency 660 Apalachee Parkway Region IV Office Tallahassee, Florida 32304 ATTN: EIS COORDINATOR 34 Court d tre

.E.

Mr. Barry Smith, Resident Inspector U. S. Nuclear Regulatory Commission Di co Technical Assessrrent P

o River Florida 32629 Office of Radiation Programs (AW-459)

U. S. Environmental Protection Agency Crystal Mall #2 Arlington, Virginia 20460 Crystal River Public Library Crystal River, Florida 32629 Mr J, Shreve The Public Counsel Room 4 Holland Bldg, Tallahassee, Florida 32304 Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Attorney General Department of Legal Affairs The' Capitol Tallahassee, Florida 32304 Dr. William R. Stratton Los Alamos Scientific Lab Box 503 Los Alamos, New Mexico 87544