ML20128P681
| ML20128P681 | |
| Person / Time | |
|---|---|
| Issue date: | 01/15/1985 |
| From: | Ross D NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | NRC |
| Shared Package | |
| ML20128P512 | List: |
| References | |
| FOIA-85-199 NUDOCS 8507130296 | |
| Download: ML20128P681 (3) | |
Text
...
u . . . . . .
f'* "'? . UNITED STATES
. , . -4 NUCLEAR REGULATORY COMMisslON .
k lD ) O WASHINGTON, D.C. 20555 5$2s I JAN 15 S35 -
Q . .>. . /
MEMORANDUM FOR: See Attached List FROM: D. F. Ross, Deputy Director Office of Nuclear Regulatory Research
SUBJECT:
EMERGENCY PREPAREDNESS RULE We are preparing an Emergen'cy Preparedness Rule for nuclear power plants based on a graded response philosophy and reflecting the results of the Accident Source Term Program. This work is contingent on a reasonably favorable eval-uation from the APS study group, and will continue only if warranted by their report. The proposed rule will be sent to the Comission at an appropriate time.
The rule is being prepared by the Regulatory Analysis and Materials Risk Branch, RES. The project manager for the rule is Mike Jamgochian. The IE Office has assigned Frank Pagano as liaison for this effort. The schedule for continuation of the staffs' development for- the rule is proposed as follows, contingent upon completion of the APS review in February:
Complete Division Review 12/83 Request Office Review & Concurrence 3/85 Complete Office Review & Concurrence ' 4/85 Complete ACRS Review 5/85 Complete CRGR Review 6/85 Rule to ED0 7/85 Rule to the Comission 8/85 The technical bases for the graded response approach used in the rule will be contained in NUREG-1082 " Technical Bases For A Graded Response In Emergency Planning and Preparedness". This document is being prepared by Len Soffer, AAB, NRR and will be subjected to a detailed technical review and evaluation by the Reactor Risk Branch, RES under the direction of Gary Burdick. The schedule for completing NUREG-1082 and providing technical support for the rulemaking is as follows:
Summary of Preliminary NUREG-1082 Conclusions 3/15/85 Draft NUREG-1082 for Technical Review 3/15/85 Final Draft NUREG ~.082 4/1/85 Principal changes expected in the proposed rule and some potential problems associated with the usc of new source term information as a basis for the rule are listed i,n Table 1.
g 71 g 6 850514 pd f 7/L DELAIR85-199 PDR D. F. Ross, Deputy Director .
Office of Nuclear Regulatory Research Attar.hment: L .
As stcted l\
QM
o, . ; ,-
TABLE 1 The proposed rule'is expected to contain the following major changes:
- 1. Emphasis on a graded response strategy, i.e., emergency planning and protective actions to be taken shoul.d be graded or phased within the emer-gency planning zone (EPZ)'with respect to both time and distance t4ased on th,e significant differences in risk that individuals in different locations of the plume exposure pathway face from postulated accidents.
- 2. Exercises limited to graded response areas.
- 3. Graded response capabilities and areas determined using new source term information.
Using new source term information'as the basis for determining graded response capability requirements and areas in which graded response would be expected raises the following potential _ problems:
\
- 1. The new source terms will be plant and sequence specific and there are strong indications that there may be significant differences in source terms depending principally on containment type. This'could lead to a rule which specifies different requirements for different reactor types or which sets out general criteria and requires each utility to establish emergency preparedness and response procedures based on a plant specific analysis. Preliminary indications are that the new requirements would not exceed the existing requirements for any plant type.
- 2. The available . source term information on which the proposed rule would be based will lack a risk perspective. Source terms and offsite consequence information will not be available for a sufficient number of plants anu'
., ' a
' TABLE 1 2
'.u sequences to obtain such a perspective. This will probably lead to requirements based on accide'nt sequences producing the most serious off '
site consequ.ence without regard to the probabilities associated with these sequences. It is expected that information needed to obtain a risk per-spective will be available in late summer 1985. However, uncertainties associatea with the information could be large enough to force us to use the most conservative sequences anyway.
- 3. Even with the new source term information, we will not have source terms for externally initiated events. This could open new rulemaking which provides a substantial relief to the criticism that it is based on incom-plete information.
e N
e
.