ML20140B829

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Rev 3 to EOP ATT-12.0, Attachment N2 Porvs
ML20140B829
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/24/1997
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17264A838 List:
References
PROC-970324, NUDOCS 9704010321
Download: ML20140B829 (2)


Text

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I REV: 3 ATT-12.0 ATTACHMENT N2 PORVS PAGE 1 of 2 ,

Responsible Manager o Date O-N-9]

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WHEN IA to CNMT NOT available, THEN perform the following .

to operate one (or both) PRZR PORV(s) in accordance with I a

guidance provided by the procedure step: l NOTE: o If RCS overpressurization accumulator pressure decreases to less than 200 psig, then recharge accumulators using S-29.2, CHARGING THE REACTOR VESSEL l OVERPRESSURE PROTECTION SYSTEM ACCUMULATORS.WITH N2.

This will require reset of CI and XY relays for the N2 supply valve to CNMT, AOV-846.

o For FR-H.1 Bleed and Feed the PORV block valve is not i required to be operable. l A) Select a PORV with an operable block valve, obtain a key for the RCS overpressurization system, and perform the appropriate step below:

o PCV-431C:

a) Verify block valve MOV-515 - OPEN AND OPERABLE I

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b) Place OP ACCUM TO SURGE TK VLV SOV-8616B to OPEN o PCV-430- i a) Verify block valve MOV-516 - OPEN AND OPERABLE i b) Place OP ACCUM TO SURGE TK VLV SOV-8616A to OPEN l

B) To depressurize the RCS in accordance with the guidance i provided by the EOP step, perform the following:  ;

o For PCV-431C, place overpressurization system arming I switch, PCV-431C N2 ARMING VLV SOV-8619B, to ARM o For PCV-430, place overpressurization system arming  !

switch, PCV-430 N2 ARMING VLV SOV-8619A, to ARM C) IF it is desired to maintain PORV(s) open below 410 psig, I THEN place overpressure bistables to the trip position: l

1. In R-2 Protection Channel 1 Rack l )

o 452B l l o 452C l

2. In W-2 Protection Channel 2 Rack l

'o 451B l o 451C l O)

(, 3. In B-2 Protection Channel 3 Rack o 450B I

l o 450C I 9704010321 970324  !

PDR ADOCK 05000244 F PDR

e a LOP: IIILE:

ATT-12.0 REV: 3 ATTACHMENT N2 PORVS PAGE 2 of 2 D) WHEN depressurization complete, THEN close PORV(s) by  !

placing SOV-8619A and SOV-8619B to BLOCK. I

, E) Ensure the overpressure protection bistables in the l untripped position: 1 i

1. In R-2 Protection Channel 1 Rack I.

4 o 452B l

o 452C 1 a

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2. In W-2 Protection Channel 2 Rack i o 451B l i o 451C i i 1
3. In B-2 Protection Channel 3 Rack i o 450B l

, o 450C l j l

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