ML19322C277

Requests Resolution of Hpis Use.Attached Ltrs Recommend Change in B&W Philosphy Re Hpis.Pumps Should Be Left on Once HPI Has Been Initiated Until Determination of Hot Leg Temp.W/O Encl

ML19322C277
Person / Time
Site:	Crane
Issue date:	08/03/1978
From:	Hallman D BABCOCK & WILCOX CO.
To:	Karrosch A BABCOCK & WILCOX CO.
References
TASK-TF, TASK-TMR NUDOCS 8001160773
Download: ML19322C277 (1)

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.u Date.

'erzter Interruptica of Eigh ? essure Injection (HFI)

• Augus t 3,1975 w,s....................-....<.....w-..o.

r aferences:

(1)

3. M. Dunn to J. Taylor, sane subject,_rebrua.ry 9, 2978.....!

(2)

3. H. Dunn to J. Taylor, sane subject, Fabi-bcry,16, 19 73. -

j t 1 lef:rc.nces 1 and 2 (attached) reew__ end a change in 3MPs philosophy for HPI ysten use during ice-pressure transients. Easien11y, they recc=end leaving

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he HFI punps cn, once E?I b s been initisted, until id 'eca be dctc =ined th::

.he hot leg ten.perature is note than.50.*F below Tsat for the Rt3 pressure.

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,Se:r Sc-eica beliefes..this. node. can cause the ?.h5 (including, 'thi.[ress$rizE:)" '.

u g solid.

~heipressuri er reliefs vill lif t, with.a water surge ithrough the

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. C ar;e piping into the quench tank.

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e believe the~ following incidents thculd b'e evaluatedi

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1.

If thh pressuri:er goes. solid with one or nere EFI punps c:ntinuing te' cperate, vould: there be a pressure spike before the reliefs open Lvhich could cause.;

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,i danage 'to the ECS?

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2.. What dansge vbuld the enter surge threugh. the relief, val.ve discharg.-..e, piping'- snd e, quench tank cause?

To date, Euclear Service has not notified our op'erating plants to ch:n'sc EFI policy i

censistent with P.cferences 1. and 2 because of.our abo' e-stated q.ucstions.

Yet, the v

l references'su;ges: the possibility. of uncoveringmthe' core ifgresent EPI-policy isj

continued.'

We~ re. quest"..t. hat Inte. gration. resolve the'issuejof' how the.HP.I.sys.te.n. sh. o. uld. be. used.

We are availsble to.hcip as needed.

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