ML20038B983
| ML20038B983 | |
| Person / Time | |
|---|---|
| Issue date: | 11/20/1981 |
| From: | Taylor M NRC |
| To: | Murley T NRC |
| References | |
| NUDOCS 8112090391 | |
| Download: ML20038B983 (3) | |
Text
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UNITED STATES s
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1 NUCLEAR REGULATORY COMMISSION
-f WASHINGTON, D. C. 20555 Sp**eg /
NOV z v 1981 NOTE TO:
Tom Murley i
ROUTINE ACTIONS (GENERIC AND PLANT SPECIFIC) OUTSTANDING ON OPERATING FACILITIES My overview reactions and observations were sought about the nature, the potential' safety significance and the possible disposition to Regional Offices of those " licensing" actions outstanding on operating reactors.
To do this, I have relied on a survey and sampling type review of the summary information contained in NUREG-0748, Volume 4, No. 5 (August 1981). My observations are summarized below, 1.
, NUREG-0748 basically treats the active (or outstanding) routine actions as follows:
Number
% of Total (a)
Multiple Plant Actions (Generic in Nature) 1.
Actions other than TMI Related 1,575
~32.3%
2.
IMI related actions (NUREG-0737 items) 2,441
-50.3%
(b)
Plant Specific Actions 836
~17.3%
TOTAL 4,852 2.
The multiplant actions,(81%)would clearly dominate the current routine workload within the NRC licensing office. The TMI-related actions represent about 60 percent of the total multiplant actions and the largest potential manpower expenditures for licensing (170,000 manhours).
I Roughly an average of.~70 manhours per action has been required for.
disposition of multiplant and plant specific actions. A spread of roughly + 4 around this average occurs depending on the particular action.
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Tom Murley 3.
Regarding the multi-plant issues (these number 188-- see Enclosure 1),
about 1/4 of those listed have no_, outstanding actions associated with the issue.
A reasonable question is -- why should these continue to be carried along in NUREG-0748 if no outstanding actions exist?
About 1/4 of the listed (Enclosure 1) generic issues apply to 30 or more plants and these, of course, dominate the number of licensing actions.
Roughly 3/4 of the outstanding actions faced by licensing lay within'this fraction of the generic issues.
In terms of the highest manpower and safety payoff, the DEDR0GR sould focus on this particular segment of the generic issues. Within this dominant segment of the issues,.the TMI-related issues are about 2:1 dominant on the number of licensing actions.
In taking a qualitative and highly judgmental look at the potential safety significance involved in the dominant TMI-related issues, I observed the following:
(a) About 1/2 of the issues are of relatively small safety significance even if the requested studies, analyses and evaluations should eventually lead to implementation of requirements into plants.
(b) About 1/3 or less are judged to be of moderate safety significance.
(c) About 1/5 or less are judged to be of pptentially higher payoff in terms of reducing risk and the likelihood of core damage / melt accidents.
(d) About 1/3 or so of these issues and their related licensing actions could potentially be accomplished by Regional Offices -- although such transfer of efforts would likely be slowed by the evolutionary nature of many of the TMI-related issues and requirements.
4.
In considering those multi-plant issues other than the TMI-rel'ated issues the Unresolved Safety Issues / nclosure 1), I observed that a majority of (these others. number 119--se Eare included within this segment of the multi-plant issues.
On the basis of past work with USI identification from similar issues previously described by NUREG-0410 a quick look at these issues (A-01 thru E-07) suggests to me that less than about 1/5 of these would be of
'~relatively high safety significance.
Also, about 30 to 40 percent of these issues and their related actions appear amenable to disposition by Regional Offices.
l 5.
A sampling review of plant specific actions was also undertaken and this indicated that about 40 percent (or perhaps more) of the plant specific actions should be amenable to disposition by the Regional Offices.
Obviously, this fraction did vary from one plant to another and it is likely that a considerable interfacing effort between the licensing PM and the Regional Offices would be needed to effect a transfer of the issues and to follow disposition by Regional Offices.
2/ There are 24 generic issues presently designated as USI's in NUREG 0748 Tor which special reports to Congress are periodically made.
For about 2/3 of.these issues, requirements are still being evaluated for eventual implementation.
.y Tom Murley G
Based on a sampling review of the plant' specific actions, it appears that in general, these actions are of lesser safety significance relative to the multi-plant actions. Also, the fraction of actions having high safety significance within the sampled population of plant specific actions appears somewhat smaller (e.g.,10-20%).
Please let me know what additional overview information might be useful to you.
1<fa7 M. Taylo
Enclosure:
As stated cc:
V. Stello E. Blackwood W. Schwink l
l 1
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