View source for 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

{{Adams
| number = ML18096B512
| issue date = 07/09/1976
| title = 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
| author name = Uhrig R
| author affiliation = Florida Power &amp; Light Co
| addressee name = Stello V
| addressee affiliation = NRC/NRR
| docket = 05000335
| license number = DPR-067
| contact person = 
| case reference number = L-76-255
| document type = Letter type:L, License-Application for Facility Operating License (Amend/Renewal) DKT 50, Safety Evaluation, Technical Specification, Amendment
| page count = 8
}}

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                                                                 '.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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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:==
                                                    ~U~ ~ 5 1976~-
44 ~4sAR ss~g0sT Re:   St. Lucie Unit    1                                                ~ANISSIDII
                                                                         ~W 4oa~
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 hours. '-         '
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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.
                                              ~                 ~
ST. LUCIE -.UNIT      1                   3/4 1-22                                   7-9-76

       ~ ~
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.
Ky comaiEsa9,on bzpir00~

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