L-76-255, Proposed Amendment to Facility Operating License DPR-67. Proposed Change Concerns a Revision of Technical Specification 4.1.3.1.3 Regarding the CEA Block Circuit Surveillance Requirements

Proposed Amendment to Facility Operating License DPR-67. Proposed Change Concerns a Revision of Technical Specification 4.1.3.1.3 Regarding the CEA Block Circuit Surveillance Requirements

ML18096B512
Person / Time
Site:	Saint Lucie
Issue date:	07/09/1976
From:	Robert E. Uhrig Florida Power & Light Co
To:	Stello V Office of Nuclear Reactor Regulation
References
L-76-255
Download: ML18096B512 (8)

Text

NRC FQRM 195 I'>> 76I MA) i I

'.s. i NucLEAR REGULATDR JMMISSI ON DOCKET NUMBER 50-335 j NRC D STRIBUTION FoR PART 50 DOCKET MATERIAL FILE NUMBER To: -.Mr. V, Stello FROIVI: .FPL DATE OF DOCUMENT 9>>76 Miami, Fla. .33101 7 R. E Uhrig DATE RECEIVED 7-15-76 KKETTER  : ZRVOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED

2) ORIGINAL RkJNCLASSIFIED

-Q COPY 3. signed 37 CC Ltr notarized 7-9-76 requests change to OL'/DPR-67/Tech Specs &

for trans;the ENcLosURE 4 1-22 &

Proposed Te h Safety Evaluation S h Ch,

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following:

(40 cys encl rec'd)

I PLANT NAME: Sti Lucie Unit 1 4@MN~~g

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>>>>hl SAFETY -'FOR ACTION/INFORMATION ASSIGNED AD! ASS NED

-BRANCH CHIEF: AD'RO

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P.O. BOX 013100, MIAMI, FLORIDA 3310I Pj Ci

~YXISmi s FLORIDA POWER & LIGHT COMPANY Doc4I ~g 0& + July 9, 1976 CO r4 '~)Ug(IIII 0PCkei: File Office of Nuclear Reactor Regulatzo Attention: Mr. Victor Stello, Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Stello:

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44 ~4sAR ss~g0sT Re: St. Lucie Unit 1 ~ANISSIDII

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Docket No. 50-335 Proposed Amendment to Facilit 0 eratin License DPR-67 In accordance with 10 CFR 50.30, Florida Power and Light Company submits herewith three (3) signed originals and forty (40) copies of a request to amend Appendix A of Facility Operating License DPR-67.

This submittal proposes a revision to Technical Specification 4.1.3.1.3. The proposed change is as described below and as shown on the accompanying Technical Specification page bearing the date of this letter in the lower right hand corner.

Pa e 3/4 1-22 The CEA Block Circuit surveillance requirements are revised.

The proposed amendment has been reviewed and the conclusion reached that it does not involve a significant hazards con-sideration; therefore, prenoticing pursuant to 10 CFR 2.105 should not be required. A written safety evaluation is attached.

Very truly yours, Robert E. Uhrig Vice President, REU/MAS/cpc Attachment cc: Mr. Norman C. Moseley Jack R. Newman, Esquire HELPING BUILD FLORIDA

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REACTIVITY COl L SYSTEMS FULL; LEl(GiH C"=0 POSITION (Continuedf .gegulateiy Docket file LIHITIhG COi<OITION FOP. OPEPATIOH (Continued)

Mith more than one fu11 length C=0 inoperable or wisa1igr. d

...fran any other C"=4, in its group by 15, inches (indicated position) or more. be in HOT STANDBY Hi>in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. '- '

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SURVEILLANCE REQUIREMENTS I

4.1.3.1.1 The position of each fu11 1ength CB sha11 be datelined to be wiith";n 7.", inches {-rdicated posit"ion) of a11 o her Cps in its group at 1east onc per 12 hcurs exc pt durinc ti-.e in rvals when he Oeviation Circuit andjot C"=0 BIock Circuit are iroperable, then veri-,j the indivMua'i.

CiA positions at. least onc per 4 hcurs.'.1.3.1.2 E ch =u11 1ergth C~ not fu11y inserted shall be det mined to be OPHABLE by.movement oi at least 7.5 inches in ary on dire tion at Teast oric per 31 days..

L 4.1.3.1.3 The CD Block Circuit shall be demonstrated OP=BABL=

at least once per 31 days by a functional est which ver'fies that the circuit prevents any C A from being misaligned from all othe CD s in its group by more than 7. 5 inches (indicated position) .

. 4.1.3.1;4 The CEA Block Circuit shall be demonst ated OPERAS~~

at each refueling interval by a functional test which, verifies that the cir'cuit maintains the CZA group over'lap and seauencing

.reauirements of Specification 3.Z..3.6.

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ST. LUCIE -.UNIT 1 3/4 1-22 7-9-76

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SAFETY EVALUATION Introduction This evaluation discusses a proposed revision to the CEA Block Circuit surveillance requirements of Technical Specification 4.1.3.1.3.

Discussion 1

The current Specification requires a functional test at least

,once per 31 days to verify that the CEA Block Circuit maintains the CEA overlap and sequencing requirements of Specification 3.1.3.6. However, performance of CEA overlap and sequencing tests at power on a 31 day basis would generate undesirable axial flux changes and unnecessarily enhance xenon transients.

Power level would have to be reduced to less than 20% rated power for the period of time necessary to borate and deborate thereby reducing plant availability. Optimum operating characteristics are attained by maintaining CEA groups withdrawn as much as possible. Therefore, it is proposed that the functional test required by Specification 4.1,3.1.3 be changed to one which verifies that the circuit revents an CEA from bein misali ned from all other CEAs in its roue b more than 7.5 inches (indicated osition).

A new Specification 4.1.3.1.4 has been added to retain the requirement for a functional test to verify CEA overlap and sequencing requirements, however, it is proposed that the test be performed at each refueling interval rather than once per 31 days. This would provide a separate surveillance of the CEA Block Circuit beyond the monthly verification described in Specification 4.1.3.1.3, but would do so without subjecting the reactor to non-optimum core profiles.

Conclusion Based on these considerations, (1) the proposed change does not increase the probability or consequences of accidents or malfunctions of equipment important to safety and does not reduce the margin of safety as defined in the basis for any technical specification, therefore, the change does not involve a significant hazards consideration,,(2) there is reasonable assurance that the health and~ safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security os to the health and safety of the public.

'4 Robert, E. Qhrig> boing N,rat, 6u3Ly Gc~wrn, 60poEIQa an@ aayos

%hat ho ia a Vice XIroai8Qnt. of Plori6a Poor 6 Xight Cozzgany, the XiconEsQa heroin>

That, hG hQQ QMGcutQ6 ChQ fozQQOLng 6ocumGnt,) 'Blat thQ otGLCG mon@a made,in Chio EJai6 6ocmIIe3I1t, are hrue and corrach to @ha beat,.of h9.a knocslackgo, information and belief, an8 that. he 9.a authorize@ to Q>rocuto the 6qcument. on behalf of aaM. Xkcenoea~

Roborlh B. 6hz g Subscribed, an@ a~corn to beforQ mQ M

'a@0 P l cg oB,F1ori6n n Gn for hQ County of Saba>

NOtARY PHttC PAT/ QF PEORIDA AP EA~

PhY COhIMISSIOt4 EXPIRES NOV, 30 1979 ROMEO JHRU CEPIERAL INS>> UNDERWRITERS.

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