ML20150E012

Requests Staff Review of Lic & Reg Actions That Use or Refer to Risk Assessment Models & Results of WASH-1400 & Review of NRC FY79 & 89 Progs

ML20150E012
Person / Time
Site:	Atlantic Nuclear Power Plant
Issue date:	11/01/1978
From:	Lowenberg H NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	Bunting J, Martin J, Nussbaumer D NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20150E009	List: ML20150E006 ML20150E012 ML20150E017
References
NUDOCS 7812110072
Download: ML20150E012 (4)

Text

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MEFORANDUM FOR: J. O. Bunting, Jr. , Acting Director

. Division of Waste Management J. B. Martin, Assistant Director

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l 1 for Fuel Cycle Safety and Licensing

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D. A. Nussbaumer, Assistant Director C- for Material Safety and Licensing h .' - /

FROM: Homer Lowenberg, Assistant Director for Operations and Technology 3

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SUBJECT:

EFFECTS OF THE LEWIS COMMITTEE REPORT ON WASH-1400 J.

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As a result of the Lewis Committee Report on WASH-1400, the Commission has requested that the staff take the following actions:

.@- 1. A review should be made of licensing and other regulatory actions l F, that have used or referred to the risk assessment models and results

' fa r of WASH-1400 since its issuance in August of 1974.

2. .opies of such documents should be segregatec and furnished to this yl office for forwarding to NRR.

-p 3. A list should be provided identifying the actions or positions -

,,.fe where WASH-1400 was used, categorized in accordance with the five

!7 categories listed in Attachment 1.

l0 lC 4. Your recommended actions and views as to whether, in view of the b Lewis Committee recommendations, any of these actions or positions should be reconsidered and the effect of such reconsideration.

l l; In addition to the survey of licensing and other regulatory actions

> noted above, your staff is also requested to make a review of the

1$ft Connission's FY79 & 80 programs and to fill in the attached table for 1g each year and for each decision unit as required. In developing the SM response to this item it is important to note the following

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• 4 1. Those decision units, planned accomplishments, and associated

. igg resources where WASH-1400 findings were used for such purposes as 7 setting program prioritiec or determining levels of effort. '

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2- November 1,1978

2. Any changes in program or resources that are now felt necessary as a

?gj. result of the Lewis Coranittee Report.

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., 3. Changes in any other related decision units that you believe are

-] necessary because of the Lewis Committee Report findings.

.hk The response to the staff survey of licensing and other regulatory actions

; is required by C.0.B. November 16, and the response concerning effects on FY79 & 80 budgets is required by C.O.B. November 3. This office will T coordinate FC and WM responses on these two items for transmittal to NRR

(, and MPA, respectively.

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b'  :-

) ss ,)y Li omer Lowenberg, Assistant Director

[j for Operations and Technology

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Attachments

1: 1 1. Categorization of Licensing Actions Ih Using WASH-1400 Values and Methodology y 2. Resource and Impact Table

[, l i cc: R. E. Cunningham, w/out attachments

%3 D. L. Anderson, w/out attachments iJ J. K. Let ohl, w/ attach .ents i* R. D. Smith, " This is a request for you to perform (fg,j the requested functions for your s branches.

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ATTACHMENT 1 3

CATEGORIZATION OF LICENSING ACTIONS USING WASH-1400 VAlf;ES AND METHODOLOGY Catecorv 1 Includes those actions in which an absolute value of accident risk T, y as set forth in WASH-1400 was relied upon in the licensing process to q make a specific licensing decision. Included in this category would be any reliance on an overall probability for core nelcing or on the probability of a given event secuence leading to core melt. A possible example is the use of the RSS to develop cuantitative estimates of health risk frem the coal and nuclear fuel cycles.

Catecorv 2 i

i Includes those actions in which the absolute values of accident risks of' WASH-1400 were used in the licensing precess, but when such use was

, restricted to relative comparisons of risks.

r L ' Included in this category would be any reliance on the overall probabilitv ~

of core melting of the RSS to draw comparisons between two desien cen-cepts. Possible examples are the use of the RSS to ccmeare an hNp

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l to a land based plant and the use of the RSS to develop perspectives e

on overall ATWS risks.

h- Catecorv 3 Includes those actions in t nich the quantitative estimates or fault tree /

. *- eve:,t t ee ana' yses c,? WASH-1400 were used in the licensing process to illustrate or onfirr: staff conel. sions en the disposition of a potential f-

• safety issue or to aid in selecting the preferred of several alternate lig; regulatory rectirements. One possible example is the NUREG-0138, Treat-i ment

of Non-safety Grade Equipment in Postulated Steam' Line Break Evaluations.

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Catecorv 4 Includes those actions in which values of WASH-1400 were modified by

[ staff to reflect different data base or experience and were'then used

in the licensing process.

,. I A possible example is the adjust aent of the RSS estimates of Scra:n unreliability in NUREG-0460.

'lt i Catecorv 5

• Includes those actions in which the event tree / fault tree methodology of WACH-1400 were used in t ae licensing process, but no reliance was made on the specific numerical estimates of WASH-1400.

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