ML20203K453
| ML20203K453 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 04/21/1986 |
| From: | Noonan V Office of Nuclear Reactor Regulation |
| To: | Goldberg J HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 8604300391 | |
| Download: ML20203K453 (1) | |
Text
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Y o
c APR 21 506 Docket Nos.
50-498 and 50-499 Mr. J. P. Goldberg Group Vice President - Nuclear Houston I.ightino and Power Company Post Office Box 1700 Pouston, Texas 77001
SUBJECT:
REPORTS ON PRA INSIGHTS - South Texas Enclosed are two draft reports concerning technical insights gained from Probabilistic Risk Assessments (PRAs).
These reports are the outcome of an ongoino effort to make available and utilize in numerous technical and managerial activities the information in PRAs recarding the factors which dominate the risk associated with nuclear power plants.
This effort includes identification of the features of desion 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 initiatina 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, 7
Vincent S. Noonan, Director PWR Project Directorate # 5 Division of PWR I.icensing-A Distribution: w/o enclosures
Enclosures:
As stated Docket Files P. Kadambi PD#5 PD85 A./
NRC PDR M. Rus k ook L ca PDR ACRS M PKadambi VSNoona kb h'/
ov OELD J. Partlow B. Grimes E. Jc,rdan 0604300391 G60421 PDR ADOCK 03000498 A
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