ML17345B388

Proposed Tech Spec Re Operating Bypasses on ESF Actuation Channels

ML17345B388
Person / Time
Site:	Turkey Point
Issue date:	12/28/1983
From:	Williams J FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17345B387	List: ML17345B386 ML17345B388
References
NUDOCS 8401040353
Download: ML17345B388 (8)

Text

TURKEY POINT UNITS 3 R 0 DOCKET NOS. 50-250 R 50-251 PROPOSED LICENSE AMENDMENT TITLE: Manual Bypass of Certain S.i. Signals ENCLOSURES:

1) Current Technical Specif ications

2) Proposed Technical Specifications

3) Operating Procedure 0205.2, Page 6 DESCRIPTION:

Technical S ecifications Table 3.5-2 Item 1.3 High differential pressure between any steam line and the steam line header - Add reference to an existing footnote which reads: This signal may be manually bypassed, when cooling down the reactor and RCS pressure is below 2000 psig.

Item 1.5 High steam flow in 2/3 steam lines with low TAyG or low steam line pressure - Add a footnote to read: This signal may be manually bypassed, when cooling down the reactor and TAyG is below 503oF.

The proposed revisions to Table-3.5-2 of the Technical Specifications are necessary to permit operational flexibility during normal plant cooldown/startup consistent with the NSSS vendor recommendations.

The automatic safety injection signal from low pressurizer pressure (2/3) can be manually blocked when the reactor coolant pressure is below 2000 psig and will automatically unblock above this pressure. This manual block shall not be used except during normal procedures for plant cooldown and startup.

The basis for the above is that when the reactor is shutdown and is to be cooled down and depressurized, the steam generator main steam isolation valves are normally closed. This brings steam header pressure to 0 psig. As the system is cooled via the steam dumps to atmosphere, the pressure in the steam generators is reduced. By design the output from the steam line header pressure transmitter is set such that the signal will not fall below that equivalent to 585 psig. Thus a safety injection would occur when steam generator pressure reaches 085 psig (100 psi Delta p) if the signal is not blocked. Currently, this signal is blocked simultaneously with blocking the Pressurizer Low Pressure signal (Table 3.5-2, Item 1.0).

The automatic safety injection signal from high steam flow coincident with either low steam line pressure or low T(avg) can be manually blocked when the reactor coolant average temperature is below 503oF and will automatically unblock above this temperature. This main block shall not be used except during normal procedures for plant cooldown and startup.

The basis for the above is that the reactor could not be cooled down and depressurized (without initiating safety injection) if this signal were not allowed to be blocked.

~ 840i.040353 05000250 PDR ADOCK 83i228 P , PDR T18:0

C I

('

ATTACHMENT I

~ TABLE 3.5-2 ENGINE=RED 5'F>>TY FUTURES ACTUATIOH 2 3 MIN. OP&AT% ACTION MIN- OEGREE IF CONDIYIOttS QF OPERABLE GF COLS% 1 OR 2 t(O..- 'Ng) IOtNL UNIT CHARNELS RHUHOANCY ~~t(NOT BE t' SAP=:.Y INJECTION Co1d Snut'd~

1.2 Hici: Contair:.ent ?ress'e. Cold Shutdown 1.3 Hi=h Qi-.iaren"ial Pr ssure bet~ n'any 5 ean Line and the Stem Lin Header 2- Cold Shutdown .

?r ssurizer Low Prmsuro"- Cold Shu>own Hi";". ="" a~ ricw in 2/3 1/1 i ne Cold Shutd~z in each

~

yi, ~ or ow Ste "Qi Vi

~ ~ <<5 r>>oc>>'~>>o

~ ~~ ~ >>4>>o 1:os

>>>> ~ ~I

~

+ ~ P ~

i

>>JR\i<<>>g

'ig>>it I 5 '<<ilail I I 2>> t ~ I ~ I '<<<<l' ~ r ~ ~ ~ ~ 4>> ~ rcl '<gsat

~ ~ ~ ~ I~ >> Ll ~ ~ 4 ~ ~ >>I ~ \ sa.

~ i<< i ~ Ay && \ ~ ~ ~

<<0

~

vAo .'C ~ ~ >> iC L"w-L"w Ste=-. ~en rator <c>> <<hu daven L vel ss "" VQ< ace (" 0 old Shv down n~e 5a Q' I'8 ion 4>> Trip o 5c:h .".ain Col d Sill'cwn Fe~water ?u'p Break rs Inis signal ".,ay 5e manually y ass+', ~~en =h ".

=or >s sh" d-.n and "". ssur ',s below 2000 psig Amendment Nos. 79 an 73

TABLE 3.5-2 ENGINEERED SAFETY FEATURES ACTUATION 2

MIN.

DEGREE OPERATOR ACTION MIN. OF IF CONDITIONS OF OPERABLE REDUN- COLUMN 1 OR 2 NO. FUNCTIONAL UNIT CHANNELS DANCY CANNOT BE MET

1. SAFETY IN3ECTION 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+ 1 ~ Cold Shutdown 18 Pressurizer Low Pressure" Cold Shutdown 1.5 High Steam Flow in 2/3 1/line Cold Shutdown Steam Lines with Low in each Tavg or Low Steam of 2 Line Pressure++ lines

2. CONTAINMENT SPRAY 2.1 High Containment Pressure 2 pel 1/set Cold Shutdown and High-High Containment set Pressure (coincident)

3. AUXILIARYFEEDWATER 3.1 Low-Low Steam Generator Hot Shutdown Level 3.2 Loss of Voltage (both OKV Cold Shutdown busses) 3.3 Safety Injection ( See 1 above -)

3.0 Trip of both Main Cold Shutdown Feedwater Pump Breakers This signal may be manually bypassed, when cooling down the reactor and RCS pressure is below 2000 psig.

This signal may be manually bypassed, when cooling down the reactor and Tavg is below 503oF.

\

AT tACH MF 6 i 3/18/83 RATING PROCEDURE 0205.2, PAGE REACTOR SHUTDOWN HOT SHUTDOWN TO COLO SHUTDOWN CONDITION INITIALS '.12 Block the high steam flow SI initiating signal after the permissive light LO Tavg BLOCK SI is illuminated. Permissive light STM LINE SAF INJ BLKO will light when signal is blocked.

8.13 Block. the low pressurizer pressure and the high steam line/header delta P SI initiating signals .r the permissive light SAFETY INJECT BLOCK TRIPPEO is illuminated. Permissive light SAFETY INJECT BLOCKEO will light when signal is blocked.

NOTES: I. The three SI initiating signals will be blocked simultaneous1y'if both permissive signals are present when the block swi tch i s turned to BLOCK.

2. The TAVG high steam flow signal will be unblocked automatically increases to 543'.

if

3. The low pressurizer pressure and high steam line header delta p signals will be unblocked automatically if the RCS pressure is increased high enough to unblock safety injection. (2000 psig).

4. The signals may be unblocked manually at any time by turning the block switch to UNBLOCK.

8. 14 Unlock and close the following 480 V breakers:

s 30532 (40733), MOV-*-865A Accumulator A to A cold leg 30631 (40532), IIOV-*-8658 Accumulator 8 to 8 cold leg 30733 (40631), MOV-*-865C Accumulator C to C cold leg

8. 15 When the RCS pressure is 1000 psig, close, lock or tag the following accumulator discharge valves:

MOV-*-865A Accumulator A to cold leg A CLOSED/LOCKED OR TAGGED MOV-*-8658 Accumulator 8 to cold leg 8 CLOSED/LOCKED OR TAGGED MOV-*-865C Accumulator C to cold leg C CLOSED/LOCKED OR TAGGED CAUTION: The accumulator valves must be closed prior to reaching 700 psig in the RCS to prevent the accumulators from discharging to the RCS.

8.16 Close, lock and tag the following valves to isolate the containment spray pumps:

• -891A A cont. spray pump i.solation CLOSED/LOCKED

• -8918 8 cont. spray pump isolation CLOSED/LOCKED 8.17 Unlock and close the following breakers,.then verify that the valves indicate closed on VPB.

30732 (40732) MOV-*-866A HH SI to Loop A Hot Leg 30621 (40621) MOV-*-8668 HH SI to.Loop 8 Hot Leg 8.18 Prior to cooling below 380' in RCS, verify closed the following SIS valves and tag the corresponding control switches on VP-B.

'MOV-*-843A HH SI stop to cold legs CLOSED MOV-*-8438 llH SI stop to cold legs CLOSED MOV-*-866A HH SI to loop A hot leg CLOSED MOV-*-8668 HH 'Sl to loop 8 hot leg- cLOsEP

STATE OF FLORIDA )

) ss.

COUNTY OF DADE )

J. W. Williams, Jr., being first duly swor n, deposes and says:

That he is Vice President of Florida Power 8 Light Company, the licensee herein; That he has executed the foregoing document; that the statements made in this 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.

J. W. Williams, Jr.

Subscribed and sworn to before me this 08K th day of jt , 1983.

rate<

NOTARY PUBLIC, and for the County of Dade, State of Florida.

Hy commission expires:

~~ >A> OF TED<

Ec e BONDED THRQ GENERAL jNS, UNDERV/Rl TERS

/

C C

• -I t, ~)

c~- rp A-,-'

"yi> ~ sill "I"