ML19224C197
| ML19224C197 | |
| Person / Time | |
|---|---|
| Site: | Cooper, Crane  |
| Issue date: | 04/25/1979 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| NUDOCS 7906290341 | |
| Download: ML19224C197 (4) | |
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12he CperatiCnal deCiSiCnS haSed SClely Cn a Single plant paraneter indication When Cne Or ~2078 CCnfi-~".atory indicatiCns are available unleSS it is e CUn " hat the action places the plan
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nanual Contain ent isolatiCn valves not re e a4 te be open during accident C nditiCnS be cicSed when Contain ent iS requireC.
.neSe talves are CICSed and Sealed.
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o Page 2.
3.
.ne 21gh Pressure Coolant In'ectica (F.?CI) and the 2.cac:or Core Isciation Cooling (RCIC) Sys:e=s functica aunc.atically as aux-liiary heat renoval syste_s if the main feecrater syste is not available. Tne EPCI System initiates aut aticall) on high dryvell pressure or ics reactor Jessel va cr level.
Tne RCIC Systen in-itiates au:c=aticallv. en icv reacter vessel level.
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'cv reactor level and continue to pt p water until the high reac:::
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t'c.c EF"' Syste: vill restart au--,-4 rally 2: the low level se:-
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a Cpera'O: Can take Canual Con:!ol Of one or both systeOs
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locally, are ten independent level indicaciens in the Ccntrol Race.
C erators are trained to lock at all the indications available and 7
this is also noted in Jarious procedures.
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- insure operators are directed not to take Canual Control of engineered safety feature s;ste c "- ass continued operation would result in unsafe plant conditions and that they are instructed to eXc. 4.e c.s..e
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loving.aintenance, valves in a syste= are prcperly pcsitioned, then surveillance procedures, perfc::ec' before retu ning the systes c service, verify t,ie positten c:. :nese va es nrougn ac:ua3 sys:c= cparation.
.nese tests a.,so nave spec 1:1c stees an, checy-ef f s when certain valves are : ved to an abnc- :a1 pesi:icn.
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Page 3.
7.
Here are three ain syste s which could transfer potentially
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.f the ?' co r C rain, Iquipment Drain, and '.'entila tion Sys:ces.
'"h e drain systers isolate on low reactor vessel level before the ECCS initiate and en high drywell pressure concurrent with ICCS in-i. ' a m* n a...
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_so a.es cr the r o conditicas described above and on high radi2:i:n lavels
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hare are also drains frc: earicus au.<11iary syst::s
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c eras _1:v.
ozic an,_ 1eas rates cre testec cer:ccica_3,v as se r
forth in the Technical Specifica:icns.
On this basis, continued operability of these isciati:n features is assured.
3.
We have re'.ieved. cur Sta ica Rules and Prac: ices and c:her Ad in-
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the operability of the required redundant safety-related systens prior to the renoval l a safety-related syste frc: service, (2) ee-ificatica cf the jerability of a safe "J-related syste fol-icuing its return to service, (3) notifica:ica of operaticnal
- c. ersonnel -tien a safe:v. systen is re cved frc: cr returned to s e r'. _ C. A.
3.
We has. reviewed :ur prc:p. reper:ing procedure for NRC notifi-tation.
,ur c.roce,ure.,or..on cal, c.ersenne.., orovides an ac-ec. tab, e ce r.noc c:. assurin that a reso.nnsi:_e person is aval,ac.e l
3 c establish continuous cc cunication with
- ".e TRC, if required, withi: the one. hour time. period.
10.
We have reviewed our operating ecdes and precedures to deal with sig.ificant arounts of hydrogen gas that ay be generated during a transient or other accident inside the pri=ary syste: or be re-leased to the contain ent.
-'he pri:2ry centaincent is.nerted with
~~
nitrogen during reactor cperation, precluding a hyd:cgen explcsic:
inside contain=ent.
he A::cspheric Centainmen A::csphere Dil-
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u:icn (ACAD) System is installed but presently avaiting NRC li-ca_..s'.n a-r, va'.
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.". ' ' a ' s o d e = 1
. '. ".. '-. " d.
e-o_.. o_
-=
s ersted during an accident condition.
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Mr. T.a r l ". Seyfri:
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a n c u. _, feu 'c. ate 2.n j quest:.cas ::nce r.ing :nis res;:nse, ;;a2se centae: ne.
Sincerely 9 88
^
,VT G Ww
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.-a Dire: or of Licensing and C.uality Acaurance
.M. -. T C T Office of Inspe::ica and Inforcenen:
Oi.isien of Rez::cr Cperations Inspe:.icn "ashington, D.C.
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