ML20236P105

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Proposed Tech Spec Change 87-42,adding Three Active motor- Operated Valves to Table 3.8-2
ML20236P105
Person / Time
Site: Sequoyah  
Issue date: 11/10/1987
From:
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20236P095 List:
References
TAC-R00246, TAC-R00247, TAC-R246, TAC-R247, NUDOCS 8711170149
Download: ML20236P105 (7)
v • d • e


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i ENCLOSURE 1 PROPOSED TECHNICAL SPECIFICATION CHANGE SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 (TVA-SQN-TS-87-42)

LIST OF AFFECTED PAGES Unit 1 3/4 8-35 Unit 2 3/4 8-34 1

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8711170149 871110 i

hDR ADOCK 05000327 l

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l-pc V-l-5/

fDARO A..y %p aJ 7kWA VIk f TABLE 3.8-2 (Continued)

MOTOR OPERATED VALVES THERMAL OVERLOAD PROTECTION Valve No.

Function 1-FCV-1-15 Stm Supply to Aux FWP turbine 1-FCV-1-16 Stm Supply to Aux FWP turbine 1-FCV-1-17 Stm Supply to Aux FWP turbine

-FCV-1-18 Stm Supply to Aux FWP turbine

-FCV-62-138 Safe Shutdown Redundancy (CVCS) 1-FCV-63-1 ECCS Operation 1-FCV-63-3 SI Pump Mini-flow 1-FCV-63-4 SI Pump Mini-flow 1-FCV-63-5 ECCS Flow Path 1-FCV-63-6 ECCS Operation 1-FCV-63-7 ECCS Operation 1-FCV-63-8 ECCS Flow Path 1-FCV-63-11 ECCS Flow Path 1-FCV-63-22 ECCS Flow Path 1-FCV-63-47 Train Isolation 1-FCV-63-48 Train Isolation 1-FCV-63-72 ECCS Flow Path from Cont. Sump 1-FCV-63-73 ECCS Flow Path from Cont. Sump 1-FCV-63-93 ECCS Cooldown Flow Path 1-FCV-63-94 ECCS Cooldown Flow Path R65 1-FCV-63-152 ECCS Recirc 1-FCV-63-153 ECCS Recire 1-FCV-63-156 ECCS Flow Path 1-FCV-63-157 ECCS Flow Path 1-FCV-63-172 ECCS Flow Path 1-FCV-63-175 SI Pump Mini-flow 1-FCV-67-123 CSS Ht Ex Supply 1-FCV-67-124 CSS Ht Ex Discharge 1-FCV-67-125 CSS Ht Ex Supply 1-FCV-67-126 CSS Ht Ex Discharge 1-FCV-67-146 CCW Ht Ex Throttling 0-FCV-67-205*

Turb Bldg Hdr Isolation

. /-Ac v-6 9-J 32 A u u l.., M V N M /4 0-FCV-67-208*

Turb Bldg Hdr Isolation t

0-FCV-70-1*

SFPCS Hx Throttle'

( / - Ac v -6 B -333 #a-ve - #M V **'d #^

0-FCV-70-11*

SFPCS Hx Throttle 1-FCV-70-153 RHR Hx Outlet Isolation 1-FCV-70-156 RHR Hx Outlet Isolation 0-FCV-70-193*

SFPCS Hdr Isolation 0-FCV-70-194*

SFPCS Hdr Isolation 0-FCV-70-197*

SFPCS Hdr Isolation 0-FCV-70-198*

SFPCS Hdr Isolation 0-FCV-70-206*

COWE Isolation 1-FCV-70-207 CDWE Throttle 0-FCV-70-208*

CDWE Isolation 1-FCV-72-20 Cont. Spray Pump Suction 1-FCV-72-21 Cont. Spray Pump Suction

  • Common for Units 1 and 2

-c = bu 22, MS7 SEQUOYAH - UNIT 1 3/4 8-35 Amendment No. EE. 61

A pc y.).gf 7 L)4w A, 7~,.y s / 7%#S M

' TABLE 3.8-2 (Continued)

MOTOR OPERATED VALVES THERMAL 0VERLOAD PROTECTION

-[

Valve No.

Function 2-FCV-1-15.

Stm Supply to Aux FWP turbine 2-FCV-1-16 Stm Supply.to Aux.FWP turbine 2-FCV-1-17 Stm Supply to Aux FWP turbine

-FCV-1-18 Stm Supply to Aux FWP turbine

-FCV-62-138 Safe Shutdown Redundancy (CVCS) 2-FCV-63-1 ECCS 0peration 2-FCV-63-3 SI Pump Mini-flow 2-FCV-63-4

.SI Pump Mini-flow

-1 2-FCV-63-5 ECCS Flow Path 2-FCV-63-6 ECCS Operation 2-FCV-63-7 ECCS Operation 1

2-FCV-63-8 ECCS Flow Path 2-FCV-63 ECCS Flow Path 2-FCV-63-22.

ECCS Flow Path 2-FCV-63 Train Isolation 2-FCV-63-48 Train Isolation 2-FCV-63-72 ECCS Flow Path from Cont. Sump 4

2-FCV-63-73 ECCS Flow Path from Cont. Sump 2-FCV-63-93.

ECCS Cooldown Flow Path 2-FCV-63-94 ECCS Cooldown Flow Path 2-FCV-63-152 ECCS Recirc M3

'2-FCV-63-153 ECCS Recirc 2-FCV-63-156

.ECCS Flow Path 2-FCV-63-157 ECCS Flow Path 2-FCV-63-172 ECCS Flow Path 2-FCV-63-175 SI Pump Mini. flow 2-FCV-67-123 CSS'Ht Ex Supply 2-FCV-67-124 CSS Ht Ex Discharge 2-FCV-67-125 CSS Ht Ex Supply 2-FCV-67-126 CSS Ht Ex. Discharge 2-FCV-67-146 CCW Ht Ex-Throttling j

0-FCV-67-205*

Turb Bldg Hdr Isolation A

in NF #8 j j

  1. m *' '## #g g/, { i TurbBldgHdrIsogtion 'h/cv-43-332.

0-FCV-67-208*

)

0-FCV-70-1*

SFPCS Hx Throttle 2.w 333 0-FCV-70-11*

SFPCS Hx Throttle gg ff.4.g / i 2.2-FCV-70-153 RHR Hx Outlet Isolation pen / 2NN Ch4NS6 A88D##

RT 2-FCV-70-156 RHR Hx Outlet. Isolation 0-FCV-70-193*

SFPCS Hdr Isolation 0-FCV-70-194*

SFPCS Hdr Isolation

~0-FCV-70-197*

SFPCS Hdr Isolation 0-FCV-70:198*

SFPCS Hdr Isolation 0-FCV-70-206*

CDWE Isolation 1'87 PE A/ f Zug ch n vG6 p;ppuvto e f A/R d ll4 f Ll'FCV-70-207 CDWE Throttle 0-FCV-70-208*

CDWE Isolation 2-FCV-72-20 Cont. Spray Pump Suction u

i 2'FCV-72-21 Cont. Spray Pump Suction

- '

  • Common for Units 1 and 2 0 = ' c 22, MS7 SEQUOYAH - UNIT 2 3/4 8-34 Amendment No. 25, 53 Y
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LENCLOSURE 2 PROPOS'ED. TECHNICAL SPECIFICATION CHANGE.-

t-SEQUOYAH NUCLEAR PLANT UNITS:1 AND 2~

DOCKET NOS. 50-327 AND 50-328:

(TVA-SQN-TS-87-42)

DES'CRIPTION AND' JUSTIFICATION'FOR THE ADDITION OF THREE ACTIVE

. MOTOR-OPERATED VALVES TO TABLE 3.8-2 l-l

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mum-m._.m_ _ _ _ _____ _ - _ _. _ _ _ _ _. _ _

_-_m_.um.--.-_ _ _. _. _ _ _ -- _ _ _ _ _--

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'l ENCLOSURE 2 i

. Description of Change

.The proposed change adds three active motor-operated valves (HOVs) to table 3.8-2 of the technical specifications (units 1 and 2) that were i

l

. prev ous y omitted.

Reason for Change A review of table 3.8-2, the American Society of Mechanical Engineers 1

(ASME)Section XI' active valve listing for SQN, and Engineering Change Notice 6883. identified that three active MOVs had been.omitted.from the technical specification table.

Justification for Change Valves 1-FCV-68-332,'-333 and 2-FCV-68-332, -333 are the block valves for the pressurizer power-operated relief valves (PORVs).

These valves are used to isolate a PORV that is stuck open or otherwise not fully closed.

The valves are considered active under the ASME Section XI testing program (Final Safety Analysis Report Appendix 6.8C).

It was~ determined that the valves have never been listed in. table 3.8-2.

The addition of:the MOVs'to table 3.8-2 is made to ensure that their associated thermal overload (TOL) devices.are' tested pursuant to surveillance requirement (SR) 4.8.3.2.

)

Valves 1-FCV-1-51 and 2-FCV-1-51 are the trip and throttle valves for the turbine-driven auxiliary feedwater (TDAFW) pumps'. The valve strokes open on a start signal to the TDAFW pump.

The valve also closes and reopens during the automatic. transfer from the normal to the alternate steam supply to the TDAFW pump turbine. As such, it is beneficial to ensure that the MOV will not spuriously trip during required MOV operations by testing the TOL devices pursuant to SR 4.8.3.2.

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1 ENCLOSURE 3 l

PROPOSED TECHNICAL SPECIFICATION CHANGE f

SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 l

DOCKET NOS. 50-327 AND 50-328 l

(TVA-SQN-TS-87-42)

DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS l

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ENCLOSURE 3 l

Significant Hazards Evaluation -

j TVA has evaluated the proposed technical specification change and determined that it does not represent a significant hazards consideration based on criteria established in 10 CFR 50.92(c). Operation of SQN in accordance with the proposed amendment will not:

1 (1) involve a significant increase in the probability or consequences of

{

an accident previously evaluated.

l The addition of the MOVs to the technical specification table ensures that their associated TOL devices are properly tested pursuant to SR 4.8.3.2.

This ensures that the MOVs wiil not spuriously trip because of TOL during an accident-type sequence.

(2) create the possibility _of a new or different kind of accident from any previously analyzed.

The testing of the TOL devices helps ensure that the MOVs will

-perform their intended function. The function of the MOVs is not altered in any manner.

(3) involve a significant reduction in a margin of safety.

The testing of the TOL devices helps ensure that the MOVs will perform their intended functions.

By ensuring that the MOVs will not spuriously trip because of TOL, the margin of safety is increased.

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