ML20052D629
| ML20052D629 | |
| Person / Time | |
|---|---|
| Issue date: | 04/23/1982 |
| From: | Eisenhut D Office of Nuclear Reactor Regulation |
| To: | Hanauer S Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-11, REF-GTECI-A-19, REF-GTECI-A-28, REF-GTECI-A-37, REF-GTECI-IS, REF-GTECI-IT, REF-GTECI-RV, REF-GTECI-SF, TASK-A-11, TASK-A-19, TASK-A-28, TASK-A-37, TASK-OR NUDOCS 8205070012 | |
| Download: ML20052D629 (2) | |
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- 1. H. Manauer. Director MD40RAMOUM FtNt:
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'L'r' FROM:
- 9. S. Eisenhet. Director D1visten of Licensing SUSJECT:
NRR Mt!WttTIZF10R OF COIERIC ISSUES: MARCH 4. 1987.
Fe11 ewing are the teamits of the NL review of your subject memorandur' as ested shove. % essaants are provided below.
As stated la set 9-3E-513. Plaa ser Early Resolution of Safety Issues, dated Augurt tl.1981 a method far prioritization of safety issues should include the aestgesent of a numerical priority inden.
Dear firs't step prierttisetten of generic issoas does not presently include a sumartcal tedes of scrit for most of the specific issues as listed.
- Also, the descriptiae Sprammy of the.4ssess does not include the necessary criteria and assumpttens teed in deteestalog how an inden of prioritization of High (H),
Medlem (W) and % (L) uns deteestood.
It is aise diffteilt at this Stealte assess notich H. M and L designated issues should recalve top priority. Steet there are 13 N. 23 M and 58 L priority 1 esses Itsted. 44 ts 1spostble to'ftsether reek these issues without using ttee proposed SECT-5-513 geestitettve inden of serit. We recommend that this tr bettere em thrther assessment of everall priority.
tedestag he =Mif the eget 19rettee tier prioritiration would list not It useld p he1
, only the specifve $geen ent$rfo@ (W. 98 and L). but also the numerical in-den neder fler the~ appropriate,teste.
Issue 22. line Stres Events. tecludes a calculated inden number of Se10 uhtch lesse Weg a h,igh py(ority'ites.. However, your memorandum to.R. Mettesa Iberth 10a IW.and entitled ~!nadvertent Beren~ Dilution, somstedes there 1gseffletest'
' ification $e regoire all 11 cent.as to meet the SW criteria' Apread61 The esserendum forther concludes that.this 1 sees is of low setety siestfloaAce.and of sash low priority as not to warrant action ny the Ifgemees. This apparent centrediction needs to be resolved.
Tem iddicate that Issue 11.Jssttee Disc Crocktet. with & designated low priortty is est by itself a alstinct generte issue. I agree with year findings that
,leeus 11 ts. pert 39.e 1
. s19eedy entsting.1ssee. A-37.. Turbine Missiles (L).
becastly eegameted tespec es$leds for low-pressure tertine discs based on crifleel efesk' rete sett ten and perledic altre-sonic tests provides
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'that car atises associated with the use of brevioush i
tuettes are rates is not invaltested.
I recommend that a new-p lity pa he deteraleed based on the above and be used in detervinir.e a geestftative n4e muser fler een6ined. Issues 11 and A-37.
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s h present common test-effective paresetort used in deterwining nv=erical ir. dice <
CP OL, and ooereting for plant speciflc 1ssees may be flawed ehen grouping; ear, Power Plant Design facilities together. In the sase of Issee A.,g. Itse for the noduction af Telnereb111ty to Indestrial sabotage (H), it may be possible to des fWtare fhet11ttes to be less senceptible to sabotage. but destgr changes te some estant of presently esisting theilities any not be cost effective.
Another esegle it llsue A-IS Increesk la Spent Ftsel pool Storage Capacity, ob9ch 'is des 1gnated as les priority. For ibcilities inwiev*. construction this issue asty be prepeply categortspd as law prlerity.
For operating plants, how-ner. fWel pools are filltag up and as ne sing capability exists, licensees are empending poe4 especities lacluding a tier rocking. hrefore, the priority any have 1su sipifteense in seen' esses and a high priority in others.
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I esquest that enestderetten be given to fhsumiating a new generic issue regard-ing enhanced, monitertag the stees generators (primary and secondary).
W ieg ladicates that me can espect lease parts to continue to be
~ Ad setendary fles Joteos f>en refkaling outages and steam IIbend'in 8
s generator 1 and repairs. Tee sehested see of properly positioned econstic trens with a library of pleet acoustic prof 11es fbr iden-tifying lesse perte in the hi$ velocity flem regtens of steam generators should be evaluated as a cost-henefit hesis against steen generator tube failures
-and ruptures,
'The subject of seurge-tors assumptions regarding redienctive iodine release for worst-case accident condittens continues to he debated since 1141. A final report en the 00E reseenk which presently indicates the NRC could safely reduce source ters assamyttens hy a faster of 50 could eeen in time to have some 1spect on the severo-eecident ed eseking. It is noted est our present methodology for detervin-ing numerical indesteg of safety issues mehs use of the WAs$1400 source tems.
If one postulates a fWture change in 1Nic source tenes, the present WASH-1400 soone teves facters based ent edine release and/or combinations of other nuclidn l
and noble esses s1pt change'stenificantly to skau our present calculations for priorit12ationof sathty issues.
Sincerely.
Darrell G. Eisenhut. Director Division of Licensing cc: W. Miners Docket File Mriungerbuhl e r MRC PDP.
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