ML17338A687

Forwards Request to Amend App a of Licenses DPR-31 & DPR-41 Re Pressurizer Level.Affidavit & Safety Evaluation Encl

ML17338A687
Person / Time
Site:	Turkey Point
Issue date:	05/02/1979
From:	Urhig R FLORIDA POWER & LIGHT CO.
To:	Stello V Office of Nuclear Reactor Regulation
References
L-79-109, NUDOCS 7905080412
Download: ML17338A687 (8)

Text

REGULATORY NFORMATION DISTRIBUTION SY TEM (RIDS)

ACCESSION NBR'7905080012 DOC ~ DATE: 79/05/02 NOTARI ED: YES FAG IL '0 250 TURKEY POINT PLANT t UNI'T 3 t FLORIDA POWER AND'IGHT C DOCKET 0

50 251 TURKEY POINT PLANTt UNIT 4t FLORIDA POWER AND LIGHT C OS AUTH'AME AUTHOR AFF IL I AT I'ON URHIGt R ~ E ~ FLORIDA POWER & LIGHT CO ~

REC IP ~ NAME RECIPIENT AFF IL'IATION STELL'Ot V DIVISION OF OPERATING REACTORS

SUBJECT:

FORWARDS REQUESTED AMEND APP A OF LICENSES DPR 31 & DPR~Qi, AFFIDAVIT & SAFE'TY 'EVALUATION ENCI ~

OISTRISUTION CODE: AOOIS COPIES RECEIVED:LTR s5 ENCL 3.

GENERAL DISTRIBUTION FOR AFTER ISSUANCE 'OF OPERATING 0IZE1'ITLE:

LIC

.'MLITT&-K ~4'q'~GO. O NP TES .

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME 'LTTR ENCL ACTION: 05 BC 7 7 INTERNAL: REG FI 1 1 02 NRC PDR 1 1 12 2 2 1'A/EDO 1 1 15 CORE PERF BR 1 1 16 AD SYS/PROJ 1 1 17 ENGR BR 1 1 18 REAC SFTY BR 1 1' 19 PLANT SYS BR 1 1' 20 EEB 1 21 EFLT fRT SYS 1 22 'BRINKMAN 1 '1

')(TERNAL+ 03 LPDR 1 1 0<k NS'IC 1 1 23 ACRS 16 16 Qgy g TOTAl NUMBER OF COPIES REQUIRED o lTTR 38'NCL 38

P.O. BOX 529100, MIAMI, FL 33152 8/kvvci FLORIDA POWER &. LIGhT COMPANY May 2;, 1979 L-79-109

'0'f f..i:ce."--o.f Nuclear Reactor Regulation Attention: Mr. 'Victor. Stello, Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D.. C. 20555

Dear Mr. Stel:

lo:

Re: Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Proposed 'Amendment to Facility 0 eratin Licenses DPR-31 and DPR-'4l In accordance, with 10 CFR 50.30, Florida Power 8 Light Company (FPL) submits herewith three (3) signed originals and forty (40) copies of a request to amend Appendix A of Facility Operating Licenses DPR-31 and DPR-41.

In the FPL response to IE Bul.letin 79-06A (Review of Operational Errors and. System Misalignments Identified during the Three Mi:le Island Incident), it was stated that FPL was evaluating, with the NSSS supplier, control circuit logic modifications necessary to automatically actuate safety injection exclusive of pressurizer level (Response 3, page 1).

The purpose of this proposal is to present. the result of the joint evaluation and the, consequent Technical Specification changes.

The proposed changes are described below and shown on the attached Technical Specification pages bearing the date of this 1'etter in the lower right hand corner..

Table 3.5-2 Pressurizer Low Level and an attendant footnote are del'eted from Item 1..4.

Table 3.5-4 Pressurizer Low Level is d'eleted from Item 3.

In the -interim, .we are operating at your request with the pressurizer level bistables in the tripped:mode, thereby establishing a situation in which a single spurious signal in the .pressurizer, pressure logic could initiate safety injection. The proposed amendment will re-establish "2 out of 3" logic and decrease the potential for a spurious trip, 'We understand you will .promptly process this request.

The proposed amendment has been reviewed by the Turkey Point Plan't Nuclear Safety Committee and the Flor ida Power 5 L'ight Company Nuclear PEOPLE... SERVING PEOPLE

Office of Nuclear Reactor Regulation Mr. Victor Stello, Director Division of Operating 'Reactors Page 2

,Review:Board. They have concluded that.

unrevi'ewed safety question.

it does not involve an In accordance with 10 CFR'70.22, we have determined'this amendment to be a Class 'III,and .Class I amendment and .have enclosed a check for four thousand four hundred dollars ($ 4,400.00):.

Very truly yours, obert E. Urhig Vice President Advanced Systems 8 Technology REU:GDW';cf Attachment cc: Mr. James P. O'Reilly, Region I'I Robert Lowenstein, Esquire

0

. TABLE 3.5-2 ENGINEERED SAFETY FEATURES ACTUATION 2

MIN.

MIN. DEGREE OPERATOR ACTION OPERABLE'HANNELS OF IF CONDITIONS OF NO ~ FUNCTIONAL TEST ,REDUN- COLUMN 1 OR 2 DANCY CANNOT BE MET

1. SAFETY INJECTION 1.1 Manual Cold Shutdown 1.2 High Containment Pressure Cold Shutdown 1.3 High Differential Pressure between any Steam Line and the Steam Line Header Cold Shutdown 1.4 Pressurizer Low Pressure* Cold Shutdown 1.5 High Steam Flow in 2/3 Steam 1/line in 1 Cold Shutdown Lines with L'ow Tayq ol Low each of 2 Steam Line Pressure lines 2 CONTAINMENT SPRAY 2.1 High Containment Pressure and 2 per 1/set Cold Shutdown High-High Containment Pressure set (Coincident)

• - =This signal may be manually bypassed, when the reactor is shut down and pressure is below 2000 psig.

TABLE 3.5-4 ENGINEERED SAFETY FEATURE SET POINTS NO. FUNCTIONAL UNIT CHANNEL ACTION SET POINT 1 High Containment Pressure Safety Injection < 6 Psl g Containment Spray*

'team Line Isolation*

Containment Isolation*

2. High-High Containment See No. 1 < 30 psig Pressure

3. Pressurizer Safety Injection Low Pressure + 1715 psi g

4. High Steam Line Differential Safety Injection < 150 psi Pressure (2/3 between any header and any line)

5. High Steam Line Flow Safety Injection d/p for 3.84 106-(2/3 lines) Steam Line Isolation lb/hr, 770 psig, 100Ã RP 6

d/p for 0.64 10 lb/hr, 1005 psig, OX RP d/p 1 inear wi th 1st stg. press Coincident with: 0-100+ RP Low Steam Line Pressure, Or > 600 psig Low Ta > 531 F

• High and High-High coincident

SAFETY EYALUATION Re: Turkey Point Units 3 8 4 Docket Nos. 50-250 5 50-251 Proposed Tech Spec Amendment.

Safet In ection Tri Lo ic Introduction This evaluation supports a proposal to delete reference to 'Pressurizer Low Level from Table 3 '-2 (Engineered Safety Features Actuation) and Table 3.5-4(Engineered Safety Features Set Points),

Discussion The NSSS vendor has performed a safety review of safety injection actuation logic modifications for application to the Turkey Point Nuclear Units. The exi sting logic will be modified 'by deleting the low pressurizer pr'essure coincident with low pressurizer level actuation logic and convertinq the protection system to a two-out-of-three low pressurizer pressure actuation only.

The basis for this modification utilizes the three existing pressurizer pressure channels for safety injection actuation and two channels for control system functi ons. Control. and protecti on requirements set forth in IEEE-27/

are addressed by the two separate pressure control channels such that a single pressure transmitter failure will not cause power operated relief valve actuation.

All current ECCS analyses are valid and appropriate for plants with safety injection initiation as a function of pressurizer pressure signals only.

Previously, safety injection was initiated on coincident pressurizer pressure and level signals. The effect of changing to a pressure -only signal will result in either an earlier initiation of safety injection, or no change in the time of safety injection initiation for all break locations. For small breaks, in the pressurizer, the pressure only signal will assure SI actuation. Therefore, current sma'll break analysis assumptions concerning safety injection initiation time are appropriate. Additionally, the effect of safety injection initiation time on peak clad temperature is negligible when initiation times being considered correspond to RCS pressures above 1400 psia. The swi tch to a pressure only safety injection signal results in a negligible impact on large break analyses.

Based upon the conclusions reached during reviews by the NSSS vendor and by Florida Power 8 Light Company, the change proposed to the Safety Injec-tion System control circuit logic does not introduce additional safety concerns, and does not involve an unreviewed safety question.

III. Conclusion We have concluded, based'n the considerations discussed above, that:

(1) the amendment does not involve a significant increase in= the probability or consequences of accidents previously considered and does not involve a significant decrease in a safety margin, (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 Commjssjon's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.

STATE OF FLORIDA )

)

COUNTY OF DADE )

Robert. E. Uhrig, being first duly sworn, deposes and says:

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

Robert E. Uhrig Subscribed and sworn to before me this

\

> 0~4 day of 19 "/V t NOTARY PUBLIC g and for the county of Dade, State of Florida NOTA' ABLIC -STATE OF FLORIDA et !ARGE htY COhIMISSION EXPIRES hIARCH 27, 1932 ppy commis s ion expires BONOEO THRU h'IAYNARO BONOING AGENCY