ML17212A850

Application to Amend to App a of License DPR-67 Adding Limitations to Address Mode 5 Operation W/Rcs Partially Drained

ML17212A850
Person / Time
Site:	Saint Lucie
Issue date:	09/28/1981
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
Shared Package
ML17212A851	List: ML17212A850 ML17212A852
References
L-81-425, NUDOCS 8110050207
Download: ML17212A850 (6)

Text

REbL>>LATORY INFORMAT'ION DISTRIBUTION SYSTEM (RIBS)

ACCESS IOH, NBR; 8110050207 DOC s DATE: 81/09/28 NOTARI'ZED: NO DOCKEIT>> 0 FACILE:50.-335 St" Lucia Plantg Unit 1< Florida Power 8 L'ight Co. 050.00335 AUTH~, NAME>> AUTHOR AFFlLIATION UHRIG i R, E, F 1 or>>i da Power (( Li ght Co, REC IP ~ '>>(A'4(EI RE CX PZ ENT AF F ILIIAT I ON EKSENHUT>>i' ~ Division of Licensing SUBJECT I Application to amend App. A of Lticense DPR"67 to add limitations to drained.

address Mode 5 operation w/RCS par ti ally DISTRIBUTION CODEINE A 09 1S COPIES RECEK VED 'l('R ENCL< S I ZEI'..

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~I P.O. BOX 529100 MIAMI,F L 33152 2 /kvi 44K FLORIDA POWER & LIGHT COMPANY September 28, 1981 L-81-425 Office of Nuclear Reactor Regulation Attention: Mr. Dar rel1 G..Eisenhut, Director Division of Licensing i.~i rg U. S. Nuclear Regulatory Commission blashington, .D. C. 20555 eEC II'g --,',

Dear Mr. Eisenhut:

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"'~. >c<M ecmroag 77 Re: St. Lucie Unit 1 COhlhlIgg ICN Docket No. 50-335 (

Proposed License Amendment Shutdown Margin Mode 5 i>-, P1>X.

In accordance with 10 CFR 50.30, Florida Power 8 Light Company submits herewith three signed originals and forty copies of a request to amend Appendix A of Facility Operating License DPR-67.

On May 14, 1980, Florida Power 8 Light Company was informed by its NSSS vendor that operation in Mode 5 (Cold Shutdown) with a partially drained Reactor Coolant System (RCS) had not been analyzed for the boron dilution event. The effect of a reduced RCS water volume was a shorter predicted time to criticality, and therefore less time for operator action to terminate the transient, assuming a shutdown margin of lg a, k/k at the beginning of the event. The event description and corrective actions were described in Reportable Occurrence 335-80-27 dated May 21, 1980.

In accordance with recommendations from the NSSS vendor, plant operating procedures have been revised to:

increase the shutdown margin to > 2.0$ z k/k thereby ensuring at least 20 mi,nutes for operator action before criticality, and

2. preclude operation with more than two charging pumps wt>en the RCS is partially drained in Node 5.

Revision of Technical Specification 3. 1. 1.2 to incorporate the conservative limitations described above will complete the corrective action required to close out Reportable Occurrence 335-80-27.

al The proposed amendment is described below and shown on the accompanying pages bearing the date of this letter in the lower right hand corner.

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i 81 0050207 P PDR ADQCK 810928~

05000335, yooaoo'EOPLE...

PDR SERVING PEOPLE

Office of Nuclear Reactor Regulation Page Two Pa e 3/4 1-3 Additional limitations are added to Specification 3.1.1.2 to address Mode 5 (Cold Shutdown) operation with the Reactor Coolant System partially drained.

Information is added to support the Mode 5 change described in Speci fi ca ti on 3.1. 1.2.

This has been determined to a Class III Amendment in accordance with 10 CFR 170.22. A check for the amount of $ 4,000 is enclosed.

The proposed Amendment has been approved by the St. Lucie Facility Review Group and the Florida Power 5 Light Company Nuclear Review Board.

Very truly yours, Robert E. Uhrig (

Vice .President Advanced Systems 5 Technology REU/PLP/ras cc: Mr. J. P. O'Reilly, Director, Region II Harold F. Reis, Esquire

STATE OP PLOHXDA )

) ss COUNTY OP DADE )

Robert F. Uhri being first duly sworn, deposes and says:

That he is Vice President of Florida Power 6 Light: Company, the Licensee herein; That he has executed the foregoing docLuTtent; that the state-ments made in this saiQ document are true and correct to the best of his knowledge, information, and belief, and that he is authorized to execute the Qocument on behalf of said Licensee,

'I Robert E. Uhrig Subscribed and. sworn to bef ore me this day 0 f r',NOTMY'UB C, in and for the County of Dade, SP'ate of Plorida tarot.ry Poetic, Slate of Prorida at Large My Commi sion Expires October 30,.1983 py comml.ssion expires -~tttttf~~y ~to a ft-Afte cy-

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