ML20065R368

RO 82-058:high Energy Lines Exist in Reactor Bldg.Study on Restraining Lines for Pipe Whip Completed.Alternatives Under Review.Requests Approval to Maintain Lines Until Refuel 5

ML20065R368
Person / Time
Site:	Crystal River
Issue date:	10/22/1982
From:	Baynard P FLORIDA POWER CORP.
To:	Stolz J Office of Nuclear Reactor Regulation
References
3F-1082-25, RO-82-058, RO-82-58, NUDOCS 8210290186
Download: ML20065R368 (2)

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October 22,1981

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.. a Mr. John F. Stolz, Chief .e. ';~

Operating Reactors Branch #4 ---

Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555 .

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 f.ER 82-058, High Energy Line

Dear Mr. Stolz:

By Licensee Event Report (LER)82-058, Florida Power Corporation (FPC) reported that High Energy Lines had existed in the Crystal River Unit 3 (CR-3) reactor building. The lines are used to blowdown the Once Through Steam Generators (OTSG's) for chemistry control during startup to approximately fifteen percent

, (15%) RATED THERMAL POWER. The lines are seismically restrained, and the piping is designed for appropriate temperatures and pressures attained during blowdoem. The lines were isolated to resolve the immediate High Energy Line Break concern. The lorig term benefit-cost of maintaining the lines isolated was not addressed at that time because of a study being performed on restraining the lines for pipe whip. That study is now complete, and the alternatives are being reviewed. It is anticipated that the approved alternative can be completed during Refuel V.

In the interim, FPC requests NRC concurrence to rnaintain these lines in a High Energy Line state during each startup of CR-3 until Refuel V. The lines are used for chemistry control in the OTSG's from MODE 5 (COLD SHUTDOWN) until approximately fifteen percent (15%) RATED THERMAL POWER. The valves would then be closed on the next scheduled entry into the reactor building by operations personnel. (Entries are made approximately every two (2) to four (4) weeks to inspect equipment).

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F210290186 82102{

DR ADOCK 05000 7p General Office 320i Tniny tounn street souin. P O Box 14042. St Petersburg. Florida 33733 813-866 5151

Mr. John Stolz

1. 3F-1082-25 Page 2 It is recognized that the failure of one of these pipea could lead to a non-isolable draining of an OTSG and possible pipe whip /impingment damage to equipment in the reactor building. However, Florida Power Corporation considers continued operation of Crystal River Unit 3 with these lines as High Energy Lines for short periods of time justifiably warranted based on the benefit derived from chemistry control of the OTSG's which is essential to preclude tube failure.

FPC has determined this request to be a class 111 amendment per 10 CFP 170.22 as le safety issue. Based on this determination, the fee of four itthousand involves a sing dollars ( $4,000) will be forwarded.

Your efforts to consider this request on an emergency relief basis is sincerely appreciated.

Very truly yours, hWW Dr. Patsy Y. Baynard Assistant to Vice President Nuclear Operations RMB/myf cc: Mr. J.P. O'Reilly Regional Administrator, Region II Of fice of Inspection & Enforcement U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 3100 Atlanta, GA 30303

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