ML20246K172
| ML20246K172 | |
| Person / Time | |
|---|---|
| Issue date: | 06/13/1989 |
| From: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Novak T NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| Shared Package | |
| ML19306D150 | List: |
| References | |
| NUDOCS 8907180083 | |
| Download: ML20246K172 (2) | |
Text
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JWi 131968 i
i" Thomas Novak., Director . g MEWAANDUM FOR: Division for Analysis and Evaluation
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J. Nelson Grece .
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FROM: Regional Administrator ,
- REGION !! COMMENTS ON PRELIMINARY4 oC '
$UBJECT:
WATER SYSTEM FAILURES AFD DEGRADAT10 REACTOR $ * 'I l ability of sfrvice wattr i On February 2, 1988.
Region !! has been sensitive to tbtf issue of the vu ner hangers to statermine i ..
systems to different types of degradation for somewl'tim
.* j operability to NRR for action. h findings of s i
ine service Review water inspections of the caseSome performeo study inreveal did notbased observations, Region upon our My!!problems support relat t ;e r
the case study. f the case study. .
to the technical accuracy of .the report. i l to inspection problems experienc E Our inspectors found that the licensees l have respoMed aggressf v are disecvered.
that have monitor been identified degradation are putat their in placesites. shortly W.
bl safter prob ets not currently w.
P The licensees are not as' aggressive in searching for pro anRespons l problems. f
' identified at their sites. h identification of n programs for Nture monitoring inopertble. of the potentiator periodi The recommenostion d apply m:
roposed tobythe ourheaddraft bulletin, but the bulletin woul R, i,
problems prior exchangers becomingis P.
to all safety relate Q, water or not. ' . d of your FRA lants with the Wm-I Our regional review was able te supoort the ord SARA includes, in it:
NUFIG 1150 plants. The "4
] System Analysis and Risk Assessment (SARA) PC software. failure database, the dominant ssequences from the PRAs i were; water pumps to one or failing all service pump New
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7 ., Original ig7rg, felt Frequency Core Melt Freoutncy u M 2.476 E-2 plant 1.54?E 4 3.288 E-3 [
- Iton 3.011 E-S 2.288 E-3 I , ,'
Grand Gulf 2.457 E-5 2.166 E-3 Surry 8.579 E-5 1.705 E-4
' + 5equoyah 8.394 E-6 ~
Peach Bottom f-r.
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e Thomas Novak 2
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lt frequency ,
Making the service water sy} stems inopereb3a increased the core m ,
by a factor of 100 at the p s,nts.
directed to Rudy Bernhard at 4 Questions conceming our comments can tt > .' 2;
\. li 7T$ 242-0339. , i 1 -
i h t.Dnd J. . Nelson Grace k
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