ML18086A229

Forwards Request for Addl Info Delineating Basis for License Condition Re Operator Action to Prevent Pump Damage Prior to Operation Above 5% Power & Actions Required of Util to Satisfy Condition

ML18086A229
Person / Time
Site:	Salem
Issue date:	03/27/1981
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Mittl R Public Service Enterprise Group
References
NUDOCS 8104090064
Download: ML18086A229 (5)

Text

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Docket Nos. : 50-311/272 Mr. R. L. Mittl, General Manager Licensing and Environment Energy Supply and Engineering Public Service Electric and Gas Company 80 Park Plaza, T17A Newark, New Jersey 07101

SUBJECT:

PROTECTION AGAINST POTENTIAL LOSS OF AU1XILIARV FEEDl~ATER PUMP SUCTION FLOW FOR SALEM UNITS 1 AND 2 The Proposed draft license for Salem Unit 2 contains the following license condition:

11PSE&G shall resolve to NRC's satisfaction the issue concerning time available for operator action to prevent pump damage prior to operation above five percent power.

11 The basis for this license condition is briefly discussed in Section 22.2, II.E.1.1 of Supplement No. 5 to the Salem SER.

Recent discussions with members of your staff have indicated that some confusion may exist about this license conditJpn. _cJhe attached* request for additional.

information delinates the basis for the license *condition and-the actions that will be required by PSE&G to satisfy thi~ condition.

Sincerely, Robert L. Tedesco, Assistant Director.

for Licensing

• \\

Division of Licensing

'\\

ct: See next page.

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NRC FORM 318110/801 NRCM 0240 OFFICIAL RECORD COPY

~usGPo.:19so-329.a24

• i.JNITED STATES -

• • NUCLEAR REGUl.,ATORY COMMISSION WASHINGTON, D. C. 20555 *

. MAR 2 7* 1981

.*o6cket'Nos~*: -so.:.311/272.*.*

~.. *' -

Mr. R~'t. Mittl, General Manager Licensing* and Environment. -_

Energy Supply and Engineering. _

• Publtc Service E.leC:tric arid Gas Company

. 80 Park Plaza, Tl7A Newark,* New Jersey** 07101 -

SUBJECT:

PROTECTION AGAINST POTENTIAL' LOSS of AUXILIARY FEEDWATER PUMP SUCTION FLOW FOR.. SALEM UNITS 1 AND 2.*

. *. : The Proposed draft 1 i cense for Sa 1 em Unit 2 contains the* fo 11 owing license condition:

11 PSE&G shal*l resolve to NRC's satisfaction the * *

. issue' concerning time available for operator

. *action to prevent pump damage prior to operation above five percent pow~r.

11

• .*..*. The *basis for this -1icen~e condition is briefly discuss~d *in<Section '22.2,>

• .lI.E.Ll_*af.Supplement No..5 to the~salemSER~

• ReC:ent. discussions with members of your staff have. indicated that some, confusion may exist about thi~ licerfse condition.*. The attached request for additional

- information delinates. the basis for the license condition and the actions that -

. will be required by PSE&G to satisfy this condition~

cc: See next ~age.-

Sincerely, *

!~"--c,..~*..

~~c~~C-i-<!.-.*<J Robert L. Tedesco, Assistant Di rector*..

.. for ~ i ceilsi ng

• .Division of Licensing.*

• i I.,

I

._*j

• .** lil

• Mr.-R. L~ Mittl, Gene~al Manager Licensi~g & Environment'

. _. - Engineering & Construct.ion Depal"tment -

• Pub 1 i c Service E.l ectric & Gas Company".

-.80 Park Plaza**

• _Newark 9 New Jersey. 07101 cc:

Richard Fryling, Jr., Esq*

• Assist ant Genera 1 Counse 1

• Public Service Eiectric & Gas Company 80 Park Plaza

• Newark, New Jersey 07101 Mar_k Wetterhahn, Esqo Conner, Moore & Caber Suite 1 oso 1747 Pennsylvania Avenue, N. W;,

Washington, D. C.

20006 Mr. Leif J *. Norrholm

-.. c/o u. s. Nuclear Regulatory Commissiori_*-

Drawer t

.* *Hancocks. Bridge, New Jersey. 08038.

• MAR 2. 7" 190 f

• I

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. MA,R 2 1".1sa1 :.. **..

' AUXiLiARY SYSTEMS'. BRANCH

.

• SALEM JJNITS 1 & 2

. DOCKET NOS. 50-272/311 *

., REQUEST FOR ADDITIONAL INFORMATION. **

AUXIUAR'f *FEEDWATER sv*sTEM '(AFWS),'.*

Long Term Reconrnendation GL-4 for improving the rel iabi.lity of AFW Systems _*

states:***

Licensees having plants with uprotected normal AFW system watersupplies should evalu.ate the design of the'ir AFW systems to.detennine Jf ~uto-matic protectfon cif the pumps is necessary following a seismic event or a tornado. The time available before pamp damag~,* the alarins arid indi-..

cations available to the control. room operator, and the time necessary for assessing the problem and taking ac'tion should be consid~red in detennining whether operator action can be relied on: to prevent pump-

.. damage~ ': ~onsideration should.be given to providing pump prote~tioii by".**.*"

. means such as automatic Switchover Of the.pump SUCtfons to the alternate.*

safety-grade source of water, automatic pump trips on low suction pressure, or. upgradfog tf1e nonnal source of water-to meet seismic c~tegory rand tornado protection requirements" *.

The. primary: water* supply for the AFWS is maintained in *the 220,.00 gallon auxiliary feedwater storage. tank (AFWST) *. The AFWST is seismiC Category I but. not tornado

' missile resi~tant. lt is not clear whether the tank can withstand tornadp or...

• hurricane*::~rid 'focoes. *It is* also not clear whether* the tank outlet pipe is pro-tected from tornadoes.

Failure of* the water supply to the AFW pump suctior;i can

- result in quick pump damage~. Our review indicates that. tornadoes or hurricanes.

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are the otily potential source of damag~ to the tank. and outlet pipe.

Ttie seismic

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.el'-

Category I and tornado missile resiste\\nt $ervicewater system (SWS} can be utilized to provide assurect back.up AfW' Sl!pply, However, the SWS is saline, and is not pel'.'fTlanently connected to the.ARI pump suction lines.

Based on an NRC request, in the event, of a tornado warning, a spool piece would be installed*;.

. connecting the two. systems. Actual utilization of service water for the. AFWS requires local operation of several manual valves.

Recent inforntation from one applic;:ant indicates that the time available for operator:i.. action. to prevent pump damage on loss of pump suction flow may _be shorter*

than previously assl!med (i.e., possibly less than one mi~ute). The licensee is therefore requested to demonst_rate that AFW pump damage will not occur with the present design in the event that the AFWST or outlet piping is damaged by the design tornado, or corrmit to implement effective design modifications.*. It is suggested that the licensee's response consider the following:

1. The maximum time interval between los.s of pump suction supply and pump trip before damage can be expected.

2.

The time _interval between occurrence of damage to the AFWST due to wind fore.es and tornado missiles from the design

.tor.nadc;> or hurricane, and loss of AFW. suction flow, based on a

.co~servative analysis.

3.

The response time of any proposed automaticpump protection devices (e.g. pump trip on low pump suction pressure) or man*ual operator action, and their compatibility with Item (1) above.