ML20094P541

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Rev 23 to Procedure 5.4.6, Primary Containment Venting & Purging Under Emergency Conditions, Revising Coversheet & Attachment 1,Sheet 3 of 5,page 8 of 20
ML20094P541
Person / Time
Site: Pilgrim
Issue date: 03/19/1992
From: Smith P
BOSTON EDISON CO.
To:
Shared Package
ML20094P531 List:
References
5.4.6, NUDOCS 9204080202
Download: ML20094P541 (2)


Text

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1 BOSTON EUISON RTYPE H6.05 I

PILGRIM NUCLEAR POWER STATION Procedure No. 5.4.6 I

l PRIMARY CONTAINMENT VENTING AND PURGING UNDER EMERGENCY CONDITIONS l

l l

l I

1 REVIEWEjS AND APPR0'fERS y

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Procedure \frLter Date l

? e27&E S YN l Technicil jR viewer Date  !

Mtd d -ktwxjz.- 3llfclf7 Validator Date 1:gi um b- Pb Smih 3 ll& lf 2 Procedure Owner Date SAFETY REVIEH REQUIRED o/k 0AD Manaaer Date ORC REVIEH REQUIRED / '

/ M/2!9' NOT-M%'4MD (RC' Chai rman Date h 7 As $bt S/M/f?_

'Piant Manaaer Date Effective Date: S-20-99 5.4.6 Rev. 23 9204080202 920330 3 DR ADOCK 0500

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ATTACHMENT 1 s.

.e t -

- Sheet 3 of 5 .

(2) Containment Atmosphere Dilution-System Torus Isolation valves

] (C170 and C171) Special' Key CR-V.

  • SV-5083A.' TORUS ISOLATION VALVE
  • - SV-5084A, . TORUS ISOLATION VALVE
  • SV-5083B, TORUS ISOLATION VALVE ,

i

  • SV-5084B. TORUS ISOLATION VALVE

....o..........................................................................

CAUTION

. >m performing the following, refer to Emergency Classifications

1.  : '-100. . Reference EAL 3.4.1.4, EAL 3.5.1.4, and EAL 3.5.2.4.

w- ,

5 01, additional venting capacity is required,

&MD primary containment pressu.re is 1 30 psig, IBER VENT the Torus, bypassing SGTS as follows:

4- (1) CLOSE 08 VERIFY CLOSED the following valves:

  • A0-5042A, T0HUS PURGE EXHAUST ISOL VLV e A0-5041A, T0kv5 NORMAL EXHAUST ISOL VLV ,
  • AO-5041B, TORUS NORMAL EXHAUST ISOL VLV
  • SV-5083A, TORUS ISOLATION VALVE

~

e SV-5084A, TORUS ISOLATION VALVE

  • SV-5083B, TORUS ISOLATION VALVE
  • SV-50848, TORUS ISOLATION VALVE (2) PLACE the-fan control' switches for SGTS Exhaust Fans VEX-210A L AMQ VEX-210B to "0FF".

P (3) CLOSE QR VERIFY CLOSED the following valves:

i

j.
  • A0-N-112 TRAIN B OUTL DHPR
  • AD-N-108, TRAIN A 00TL OMPR L

(4) OPEN AD-50428, TORUS. PURGE EXHAUST ISOL VLV, bypassing isolation interlocks according to PNPS 5.3.21, " Bypassing Selected Interlocks" Attachment 12.

5.4.6 Rev. 23 Page 8 of 20

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