ML14192A752
| ML14192A752 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 03/20/1986 |
| From: | Rubenstein L Office of Nuclear Reactor Regulation |
| To: | Utley E CAROLINA POWER & LIGHT CO. |
| References | |
| NUDOCS 8603260155 | |
| Download: ML14192A752 (2) | |
Text
Dodket No. 50-261 DISTRIBUTION
'Docket File J. Partlow NRC PDR G. Requa Local PDR C. Vogan Mr. E. E. Utley, Senior Executive PAD#2 Rdg ACRS (10)
Vice President T. Novak Gray File Power Supply and Engineering OELD and Construction E. Jordan Carolina Power and Light Company B. Grimes Post Office Box 1551 Raleigh, North Carolina 27602
Dear Mr. Utley:
SUBJECT:
REPORTS ON PRA INSIGHTS Enclosed are two draft reports concerning technical insights gained from Probabilistic Risk Assessments (PRAs).
These reports are the outcome of an ongoing effort to make available and utilize in numerous technical and managerial activities the information in PRAs regarding the factors which dominate the risk associated with nuclear power plants. This effort includes identification of the features of design or operational practices which have been found to be important to safety in the types of plants which have been subjected to risk assessments. In addition, the section on insights into PRA methodologies focuses on areas which are sensitive to the results and the overall perception of plant weaknesses and vulnerabilities.
In particular, these reports contain discussions of:
general insights on plant strengths and weaknesses gained from PRAs; the contribution to core melt frequency from classes of sequences induced by various initiating events; modifications, both hardware and procedural, which have been implemented to address problems identified in the conduct or as a result of PRAs; insights into PRA methodologies; and the contribution to measures of risk (core melt frequency and consequences of radioactive releases) from systems, components and events.
These reports are being provided to you, as well as all other licensees, in advance of formal publication for your information. Your comments and suggestions are welcome on these reports.
Sincerely, Original signed by 6020155 86000261
\\L
.Rted DR ADOCK 0 PDR Lester S. Rubenstein, Director P.
.PWR Project Directorate #2 Division of PWR Licensing-A
Enclosures:
As stated cc w/o enclosures: See next page PM:PAD#2 i
GRequa:hc LRubenst jn 3/ /86 3/0/86
'Mr. E. E. Utley Carolina Power & Light Company H. B. Robinson 2 cc:
G. F. Trowbridge, Esquire Mr. Dayne H. Brown, Chief Shaw, Pittman, Potts and Trowbridge Radiation Protection Branch 1800 M Street, N.W.
Division of Facility Services Washington, DC 20036 Department of Human Resources P.O. Box 12200 Raliegh, North Carolina 27605 Mr. McCuen Morrell, Chairman Darlington County Board of Supervisors County Courthouse Darlington, South Carolina 29535 State Clearinghouse Division of Policy Development 116 West Jones Street Raleigh, North Carolina 27603 Attorney General Department of Justice Justice Building Raleigh, North Carolina 27602 U.S. Nuclear Regulatory Commission Resident Inspector's Office H. B. Robinson Steam Electric Plant Route 5, Box 413 Hartsville, South Carolina 29550 Regional Administrator, Region II U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street Atlanta, Georgia 30303 Mr. R. Morgan General Manager H. B. Robinson Steam Electric Plant Post Office Box 790 Hartsville, South Carolina 29550