ML20117N882

Responds to NRC Request for Addl Info Re Minitoring Sys

ML20117N882
Person / Time
Site:	05200003
Issue date:	05/09/1996
From:	Winters J WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	Kenyon T NRC
Shared Package
ML20117N226	List: ML20117N840 ML20117N848 ML20117N854 ML20117N857 ML20117N877 ML20117N882
References
NUDOCS 9606250040
Download: ML20117N882 (5)

Text

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i FAX COVER SHEET Westinghouse 3

e RECIPIENT INFORMATION SENDER INFORMATION 4'

OATE: mW 9 199(, NAME: T, (uam LOCATION: ENERGY CENTER -

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> PHONE- FACSIMILE: PHONE: Orrice #fz.71V-529o Facsmie: win: 284 4887 COMPANY:

outside: (412)374-4887 U s AI/d c LOCATION: _

Cover + Pages 1+[

The f6866 Wing pages are being sent from the Westinghouse Energy Center, East Tower, ,

Monroevale, PA. If any problems occur during this transmission, pieces call:

WIN: 2M125 (Janice) or Outside: (412)3744125.

l COMMENTS:

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NRC REQUEST FOR ADDmONAL INFORMATION PREi!M! NARY l 1

1 _

4 Question 410290 Essential system parameters are monitoredr meters. in the ma water heating the hot water heating system. The instruments for ers relatedtheto heat ex the b piping a.,;c- system. Do these instruments provide indication shange? in the room (c.r control pumps were inidally desig sh, A-wier heating system aMt

Response

therefore has no nuclear safety design basis. y-relatedThe function and informatio the system's potential for impact on the safety of the pfant e subsection is sufficient for review of for monitoring system parametets and that essential system parameters are monit e main control room. The on the dc h #c ey. This allows for any of the room. Local disp!

ri the control system in system operating display of is also provided as requested by the roving operator on his portable dis

. Normal engineering process scribed in Chapter 18 of the SSAR. stem parametnc data will be dev SSAR Revision: NO.

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16. TECHNN:AL $PECtRCATION

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i * ** ' Startup Feedwater Isolation and Control Valves Revision 21 2

EffecWwe: 01/13/94 3.7.7 3.7 PLANT SYSTEMS _

l 3.7.7 Startuo Feedwater Isolation And Control Valves i

LCO 3.7.7 Both Startup Feedwater Isolation Valves and Control Va'ves shall be OPERABLE.

l APPLICABILITY: M:) DES I, 2, and 3.

i ACTIONS '

CONDITION REQUIRED ACTION COMPLETION TIME A. Only one valve A.1 Restore both a control 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> v OPERABLE in a single and an isolation valve flow path. in each flow path to OPERABLE status.

,0,R, A.2 Isolate the flow path. 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> '

B. Two valves in the B.1 Enter LCO 3.0.3 Immediately same flow path inoperable.

SURVEILLANCE REQUIRENENTS SURVEILLANCE FREQUENCY t

SR 3.7.7.1 Verify both startup feedwater isolation M i-dnd Control valve 5 are UPLHABLE. In w oeb.a u wi k

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16. TECHNICAL SPECMCATION Startup FCedwater Isolaticn and Control Valves  !

i Revision: 1 B 3.7.7 Effoodve: 01/13/94 j l

} PRELIMINARY 1 i 8 3.7 PLANT SYSTEMS 4 ,

i ,

8 3.7.7 startuu Feedwdter Isu14 tion and Control Valves l BASES i

l

! BACKGROUND The startup feedwater system supplies feedwater to the steam 1 ,

generators during plant startup, hot standby and cooldown, '

j and in the event nf main fandwater unty411 ability.

i The startup feedwater system serves no safety-related i function and has no safety-related design basis, except to isolate feedwater in the event of a feedwater or steam line

_ break inside containment.

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.d cc.4 den . FuLcb c e.w k smw 1 p APPLICABLE The basis for the requirement to isolate the startup -

SAFETY ANALYSES feedwater system is established by the analysis for large Steam Line Break (SLB) inside containment. It is also influenced by the analysis far a large Faadlina Remak (FI R)

Failure to isolate the startup feedwater system following a

() SLB or FLB can lead to additional mass and energy being W delivered to the steam generators, resulting in excessive br o cooldown and additional mass and energy re' ease in L conta1RW nt.

%pg C-o , cc M9 % b [cM T-cold--Low signab closef the startup feedwater control and isolation valves and trips the startup feedwater pmaps.

The startup feedwater isolation and control valves are l components which actuate to mitigate a Design Basis /

Accident, and as such meet Criterion 3 of the NRC Policy /

Statement.

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18. TEcMucAL SP5clRCATION Ravesian: 1 Startup Feedwater Isolation and Control Valvas eNeedve: 01/13/94 _

B 3.7.7 I PRELIMINARY a BASES (continued)

LC0 This LCO ensures that the startup feedwater isolation and control valves will actuate on connand, following a SLB or FL8, and isolate startup feedwater flow to the steam generators.

The startup feedwater isolation and control valves are considered OPERABLE when they close on an isolation actuationlimits.

required signal, and their isolation times are within the APPLICABILITY The startup feedwater isolation and control valves must be OPERABLE whenever there is significant mass and ener the Reactor Coolant System and the steam generators.gyThis in ensures that, in the event of a high energy line break, a .

single failure will not result in the blowdown of more than one staan generator.  ;

In MODES 1, 2, and 3 the startup feedwater isolation and control valves are, required to be OPERABLE in order to limit the amount of mass and energy that FL8. 5.uuld be added to containment in the event of a SLB or When the valves are closad, they are aircady j  ;

performing their rafety function.  !

In MODES 4, 5, and 6, the energy in the steam generators are low, and isolation of the startup feedwater system is not i required. i i

1 ACTIONS A.1 and A.2

\

With only one valve (isolation or control) OPERABLE in a

! single iso ateflow path, there is no redundant capability to the flow path. In this case, both an isolation and .

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a control valve in each flow path must be restored to i OPERABLE status with 72. hours, or the flow path must be

isolated. A Completion Time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is acce since, with one valve in a flow path inoperable,ptable there is a second valve available in the flow path to isolate the line.

If both the isolation and control valves in a single flow 1 path cannot be restored to OPERABLE status in the required

Completion time, then the flow path must be isolated by closing the OPERA 8LE valve.

1 (continued)

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