ML20151J602

Rev 25 to Chapter 1, Locked Valve List

ML20151J602
Person / Time
Site:	Millstone
Issue date:	07/25/1997
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
References
1-OPS-10.11, NUDOCS 9708050191
Download: ML20151J602 (3)

Text

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• NDS Document Transmittal 7/28/97 ,

To: Nuclear Regulatory Commission Addressee uniques 140 Document Control Desk ROUTINE distribution Washington, D.C. 20555 -

4 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.

4 DOCUMENT REV COPIES 10.11, CH1 25 1 t

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4 9708050191 DR 970725 ADOCK 05000245 PDR_

Retum this form to NDS, MP475,3rd Floor, C/O Rick Lundin (x2446) as soon as received.

Signature Date: ,,,,,

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. MILLSTONE NUCLEAR POWER STATION

/3 UNIT 1 TO: DISTRIB ON DEPARTMENTAL INSTRUCTION NO.1-OPS-10.11 l FROM: '

REVISION 21 cst h UNIT P SMANAGER l" M

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SUBJECT:

L D VALVE LIST C4-t PAGE 1 of12

1. TECHNICAL REFERENCES 1.1 10CFR50 Appendix A, General Design Criteria 55,56,57 NUREG-0824 I Integrated Plant Safety Assessment, Systematic Evaluation Program, Millstone Unit 1 ,  ;

References:

OP 301 OP 316 l OP 302 OP 317 l OP 303 OP 319 <

OP 304 OP 321 OP 305 OP 322 OP 306 OP 335 OP 307 OP 336 OP 309B OP 338 O or >o9c OP 310 08339 OP 311 OP 312A

2. VALVE L-OCKING CRITERIA 2.1 The majority of valvec locked in position on Unit One are locked to comply with the code of Federal Regulations and NUREG-0824. These deal with isolating containment on systems that penetrate containment. Valves may also be locked to assure an adequate flow path for emergency systems (suction, discharge valves, starting air or fuel for emergency generators), to prevent inadvertent discharge, to prevent inadvertent cross connecting of systems.

Valves can also be locked to prevent inadvertent operation (tampering) or to prevent'a throttled valve from changing position due to system flow or vibration.

Locking Technioues When components require the placement of a locking mechanism, the lock will be placed in such a way to prevent operation of the component from the required position. The strength and durability of the locking mechanism are to be commensurate with the consequence of mis-operation.

When components are to be in their off-normal position, the locking mechanism is not required to prevent component manipulation, however, it should be secured nearby so that it is not lost.

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When locking chain operated valves, ensure the lock is close enough to the valve to prevent partial operation.

1-OPS-10.11 ll[

Rev.25 Iage 7 of 12

}' 312D Drains and Sumps ,

Valve Number Description Lasked Position l i 1-SS-41 Moat Drain to LI.S. CL

[

1-SS-50 DWED PP Disch to RBFDS "B" CL 1-SS-57 LLRTTest Conn. CL r 1-SS-58 LLRT Test Conn. CL i 1-SS-60 ' LLRT Test Conn. CL 1-SS-61 LLRT Test Conn.

CL  !

! > OP 316 Feedwater System

Valve Number Description Locked Position '

l 1-FW-11A . "A" FW to Vessel OP 1-FW-11B "B" FW to Vessel ,

OP 1 -FW-12A "A" FW Check Test Conn CL 1 1-FW-13A "A" FW Check Test Conn B U. CL i, 1-FW-12B "B' FW Check Test Conn CL i 1-FW-13B "B" FW Check Test Conn B.U. CL ,

a 1-FW-14A FFP Recire Valve

• Throttled 1-FW-14B RFP Recire Valve

• Throttled

1-FW-14C RFP Recirc Valve

• Throttled j 1-FW-34A A HP Htr Layup Hdr CL

1-FW-34B B HP Htr Layup Hdr CL

n 1-FW-105A A EW. HDR. LLRT Stop CL iQ 1-FW-106A A EW. HDR. LLRT Stop B/U CL 1-FW-105B B EW. HDR.LLRT Stop CL

{ 1-FW-106B B EW. HDR.LLRT Stop B/U CL j 1-FW-107A A HDR test stop CL $

i 1-FW-107B B HDR test stop CL i

• Manual Operator is throttled.

s OP 317 Main Steam  ;

I Valve Number Descriotion Locked Position  ;

1-MS-14A MS Line A Test Conn CL

.1-MS-15A MS Line A Test Conn B.U. CL 1-MS-14B MS Line B Test Conn CL

, 1-MS-15B . , MS Line B Test Conn B.U. CL 1-MS-14C MS line CTest Conn CL 1-MS-15C MS Line C Test Conn B.U. CL 1-MS-14D MS Line D Test Conn CL 1-MS-15D MS Line D Test Conn B.U. CL 1-MS-20 Steam Drain Test Conn. CL  ;

1-MS-21 Steam Drain Test Conn B.U. CL 1-MS-113A MS line A Test Conn CL 1-MS-114A MS Line A Test Conn B.U. CL 1-MS-113B MS Line B Test Conn CL 1-MS-114B MS Line B Test Conn B.U. CL -

1-MS-113C MS Line C Test Conn CL 1-MS-114C MS Line C Test Conn B.U. CL 1-MS-113D MS Line D Test Conn CL 1-MS-114D - MS Line D Test Conn B.U. CL

,