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NUCLEAR FIEQULATORY COMMIS$10h g
seApiness:o.a.s.g.eeste October 6. 1993
.....}
S, Docket No. 50 397 M[MOMNDUM FOR:
Kenneth E. Perkins, Disector '
Division of Reactor Safety and Projects Region V FRON:
tilnor C. Adensas. Assistant Olrector for Region IV & V Reactors Olvision of Reactor Projects !!!/IV/V office of Nuclear Reactor Regulation
$UBJ[CT:
INi[RPR[ FAT!0N Of OP[ RATIONS WITH THE POT [NilAt FOR D MINING THEREAC10RVtl5(LATWNPt(1ACNO.h661Cl)
We are providing the NRR response to your memorandus to Jack Roe dated June ll, 1993. Your memorandve, which followed estensive discussions with NRR staff and an t.aall request from Phl111p H. Johnson dated June 3.1993, requested NRR's interpretation of a footnote in the WNP=t technical tsat dealt with havino secondary containment estabitshed specifications (15) fuel is being handled,a the secondary containment and
'[W; hen irradiated dur'ng CORE At1[RAflDN5 and operattens with 4 potential for draining the reactor vessel.' We have addressed this action as a Task Interface Agreement i
(TIA).
I In the fl, the word ' potential' means 'somethin that exists in a state of i
potency or possibility for char.gtng er develop! g lato a state of actuality.'
It follows fron this definttlen that even thout features are provided that reduce the likelihood of drainin the potential for such drainingcancontinuetoexist.gthereactervesse)lbedinyourmemorandum The operatten descr was the use of the residual heat removal (RNR) system to lower the water level t
in the raatter cavity. Two Independent suction valves were designed to automatically isolate at a specified water level..However since the fatture j
ofbothispossible,thisisan'sperattenwithapotentlaIfordrainingthe reactor vessel.*
If the licenses believes that any conditions described by ' operations with a l
potentini ror draining the reictor veiisi ihovid not reivire the i
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Kenneth [. Perkins 2
estabitshment of setendary containment, a reevent for change to the 15 eleag with justificatten (e.g. compensatory actlen) theeld be made to the staff. A good avenue to protese the skonge is threvsk the Owners Groups in the implementatten of taproved llandard techalcal Specificattens.
The hat ntaf f recognises the generic applisatility of this issve, we are working with the twA0G to en,vre a ceantitent efinttten for thin 15 M
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...I, tant,,re.ter for Seglen IV & V Atactort Civinson of teacter Projects lil/lviv Of fice of livclear peacter Regwtatiea st: C. 16th t, a l 1 Mtrichelf. All I. Creenaan. Allt
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e kenneth [. Perklas entabillhaent of leCendary Containment A requent for Chante to the 15 along with justifttatten (e.g. geopengstory attlen) theuld be pode te the staff. A ge64 avenue te propese the thange la threvgh the Owners Creeps la the laplementellen of leproved Standard 14thatc41 Specificatleas.
the het staf f recogalgos the generig appiltebility of thlt latwe. We are working with the tut 0G to ensure a toaststent definttlea for this In
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(llaer G. Adeales. Antistent Diretter for Aeglen IV & V Reactern Divisten of Reacter Projects Illilves Office of hvclear teatter ae,.lativa ca.
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