ML18227C702

Letter Request to Amend Appendix a of Facility Operating Licenses

ML18227C702
Person / Time
Site:	Turkey Point
Issue date:	01/25/1977
From:	Robert E. Uhrig Florida Power & Light Co
To:	Stello V Office of Nuclear Reactor Regulation
References
Download: ML18227C702 (10)

Text

NRG F'ORM I95 (2.76)

U.S. NUCLEAR REGUI ATORY~MISSION DOC1CFl NU ER y

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NRC DISTRIBUTION FOR PART 50 DOCKET MATERIAL Mr G. Lear F.ROM:

Florida Power

& Light Co Miami, Fla R E Uhrig FILE DATE OF DOCUMENT 3.-25-77 DATE RECEIVED 1 28 77 5fl.ETTE R

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.ISNOTORIZED S UNCLASSIFIED PROP INPUT FORM-~

NUMSER'OF COPIES RECEIVED

t...oqe ~signed DESCRIPTION Ltt notarized 1-25-77.....trans the following

ENCLOSURE 1

.Amdt to OL/Cjjange to,Tech Specs:

Consisting of Yevisions "with 'regard to load vs flux code limitations.....(59 cys encl rec'd) lp 4p pLANT p~~m:

Turkey pt 3 & 4

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ACKNOWLEDGED SAFETY ASSIGNED AD:

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LIC ASST NRC PDR I & E 2

OELD GOSSICK & STAFF MXPC CASE HARLESS PROJECT MANAGEMENT BOYD P,

COLLINS HOUSTON PETERSON MELTZ HELTEMES SKOVHOLT LPDR ~

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NRC FORiVl 196 (2 76)

INTERNALD SYSTEMS SAFETY HEXIKIIAN SCHROEDER ENGINEERING 1IACARRY KNIGHT SXHWEIL PAWL CK REACTOR SAFE ROSS NOVAK ROSZTOCZYI CHECK AT&I SALTZMAN RUTBERG EXTERNAL DIS'KR I BUTION NAT LAB

'EG V.IE LA PDR CONSULTANTS'E T

5 ISTRl BUTION PLANT SYSTEMS TEDESCO XPPOLITO OPERATING REACTORS STELLO OPERATING TECH EISENHUT B

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ULRIKSON OR SXTE SAFE ERNST BALLARD SPANGLER SITE TECH GAMMILL STEPP HULMAN SITE ANALYSIS

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COLLINS KREGER CONTROL NUMBER

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P. O. BOX 013100, MIAMI, FL 33101 pic I(i FLORIDA POWER & LIGHTCOMPANY 00CKETED ll II$IIR'0 Iie.el>>

regulatory Docket File 0

January 25, 1

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~J 14KJgyj~Ogy C'irector of Nuclear Rea tion Attention:

Mr. Victor Stel o, D'ctor

Dear Mr. Stello:

Re:

Turkey Point Units Docket Nos.

50-250 Proposed Amendment 0 eratin Licenses 3 and 4

and 50-251 to Facility DPR-31 and DPR-41 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D.

C.

20555 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 Licenses DPR-31 and DPR-41.

The proposed change is described below and shown on the accompanying Technical Specification page bearing the date of this letter in the lower right hand corner.

Table 4.1-1 (Sheet 1)

Item 1, Remark 1 is revised to read "Load vs. flux curve, or hT vs. reactor power curve".

The proposed change has been reviewed by the Turkey Point Plant Nuclear Safety Committee and the Florida Power 6

Light Company Nuclear Review Board.

They have concluded that it does not involve an unreviewed safety question.

A safety evaluation is attached.

Very truly yours, ROBERT E.

UHRIG Vice President, REU/MAS/cmp Attachment

~ 958 cc:

Norman C. Moseley, Region II Robert Lowenstein, Esquire PEOPLE... SERVING PEOPLE

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TABLE 4 1-1 MINIMUHFREQUENCIES FOR CHECKS, CALIBRATXONS AND.

TEST OF INSTRU>tENT CHANNELS

'hannel Descri tion Check Calibrate Test Remarks 1,

Nuclear Power Range (Check, Calibrate and Test only applicable above 10K of rated power.)

S (l)

X*(4)

O (2) g*(4) m (3}

1) Load v.s. flux curve or AT vs. reactor power curve

2) Thermal power calcele

. 3) Signal to AT; bistable action (permissive, rod stop, trips) 4'} Upper

& lower detectors for symmetric offset

(+5 to -5R 2.

Nuclear Xntermediate Range S (1)W HeA.,

P (2)

1) Once/shift up to 50K R,P.

2) Log level; bistable action (permissive, rod stop, trip) 3 ~

Nuclear Source Range

,4 ~

Reactor Coolant Temperature S (1)

NeA.

P (2)') Once/shift'hen in service

2) Bistable action (alarm, trip

- B/W (1)f

1) Overtemperature-AT (2)f

2) Overpower-AT 5

Reactor Cool/et Flow S.

Pressurizer Water Level

~ St't R

7.

Pressurizer Pressure 8.

4 kv Voltage 5 Frequency 9.

Analog Rod Position'f N.A't R

R*4 Reactor protection circuits oddly With step counters 1/25/77

SAFETY EVALUATION

==

Introduction:==

This safety evaluation supports a proposed change to Table 4.1-1 of tile Turkey Point Technical Specifications.

Item 1, Remark 1 is revised to add the option of using the "hT vs. reactor power curve" during shift checks of the Nuclear Power Range instrument channels.

Discussion:

The present Technical Specification requires use of the "load vs. flux curve" during shift checks of the Power Range instrumentation.

The proposed change adds the option of using the "dT vs. reactor power curve".

The Power Range nuclear instrumentation is presently checked at, least once per shift. by comparing indicated power level with the power level derived from the "load vs. flux curve".

By knowing the generator load and back

'ressure, the "load vs. flux curve"can'be-'sed to determine reactor power.

However, because of secondary inefficiency caused by such things as opening heater

bypasses, changes in intake cooling water temperature, or changes in back

pressure, large corrections may be needed in order to derive the correct power level from the "load vs. flux curve"..

Therefore, it is proposed that the Technical Specifications be amended to permit the use of the "hT vs. reactor power curve" when checking the accuracy of the Power Range instrumentation.

Secondary inefficiency will not affect the power level derived from this curve, and the curve will be easy to use because the relationship between hT and reactor power is linear.

The purpose of the channel check is to detect gross failures such as blown fuses, defective indicators, or faulted amplifiers which result in "upscale" or "downscale" indica-tion.

The capability of detecting such failures will not be reduced by use of the "bT vs. reactor power curve!'.

In addition, tne Power Range shift checks are backed-up by a daily calibration which provides a more accurate determination of instrument operability.

==

Conclusions:==

Based on these considerations, (l) 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 de-fined in the basis for any technical specification, therefore, the change does not involve a significant hazards consideration, (2) there is reasonable assur-ance 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 de-fense and security or to the health and safety of the publi'c.

1/25/77

STATE OF FLORIDA

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ss 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 day of OTARY PUBLIC, in and for the County of Dade, State of Florida NOTARY FNUC STATE OF FLORIDA AT EAR(X MYCohMISSION EXPIRES NOV. 30 l979 ission expires-

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