ML20038C413
| ML20038C413 | |
| Person / Time | |
|---|---|
| Issue date: | 10/13/1981 |
| From: | Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| References | |
| ACRS-1893, NUDOCS 8112100612 | |
| Download: ML20038C413 (5) | |
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MINUTES OF THE ACRS SUBCOMMITTEE q
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MEETING ON LICENSEE EVENT REPORTS
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SEPTEMBER 9,1981 1 NOV2 019815 3
WASHINGTON, D.C.
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w The ACRS Subcommittee on Licensee Event Reports held a meetin'g
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9, 1981, at 1717 H Street, N.W., Washington, D.C.
G. R. Quittschreiber was the Designated Federal Employee for the meeting.
The principle attendees at the meeting were:
W. Mathis, Chairman D. Ward, ACRS Member D. Moeller, ACRS Member W. Lipinski, ACRS Consultant Z. Zudans, ACRS Consultant I. Catton, ACRS Consultant C. Ryder, ACRS Fellow G. Quittschreiber, Staff Engineer W. Mathis stated that the purpose of the meeting was to receive a progress report and to discuss the work of the Office of Analysis and Evaluation of Operational Data with regard to the evaluation of the licensee event reports.
The entire meeting was open to members of the public. No oral or written statements from members of the public were received.
Introduction C. Michelson began with a brief introduction.
W. Mathis suggested that an update on the BWR scram report be deleted from the agenda because of time. Michelson noted that AE0D would be providing a report in the near future.
D.. Ward suggested that the discussion be limited to the methods and approaches to the scram study.
This was agreed upon.
Overview J. Heltemes talked on the organizaticn of AEOD. He stated that the purpose of the organizational structure is to provide an in-house expert capability to analyze 8112100612 811013 PDR ACRS 1893 PDR
., a LER Meeting 9/9/81 c-operational data. The management consisted of Michelson as Director, Heltemes as Deputy Director, and 9 engineers. The agency program was described. Also given was a a list of the in#crmation sources that AE00 uses. A list of the studies that were in progress and the completed projects was also given.
BWR Scram System Break Study S. Rubin presented the BWR Scram System Break Study. The background material that lead to this case study was explained.
Several findings and recommenda-tions resulting from the work were discussed.
Because of time limitations, the sections of the discussion on the postulated event, event analysis and evaluation and detailed findings were not presented. AE00 will be furnishing a detailed report in the near future.
The BWR Scram Case Study like other AE0D reports,' will be the subject of follow up work.
Rubin stated that, in this case study, AE0D acted at fir;t as experts for the NRC, later, AEOD performed a consulting role as NRC became acquainted with the work. Guidance, comments, suggestions and recommendations were provided by AE0D to NRR to be used with the information from General Electric.
Screening Process C. Michelson presented a discussion on the AE0D event screening process. Michelson stated that the purpose was to identify operational experience of safety signifi-Cance.
The screening process includes an evaluation of operational data by three people.
Daily reports are often used.
Eventually, reports are classified into four categories. Reports that come under the first category get immediate attention.
Reports in the second category receive further study. Reports in the third category are reviewed again to determine if further study is needed. Reports in the fourth category are filed away. Category 1 and 2 reports are seen by Michelson. The, screening criteria involve a subjective evaluation, but this was all that was possible.
Lipinski asked if multiple failure studies could be done using LER and made reference to a report by Ryder where failures were reported on separate LERs. Michleson stated that the quality of the LER is a limiting factor.
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LER Meeting 9/9/81 Michelson said that the screening process is a manual process that lead to difficulties when doing studies on trends and patterns. This was why an automated system was being developed.
Sequence coding is a data retrieval system. Michelson stated the quality of the data was not considered. The many ways that event information could be retrieved were discussed.
Sequence Coding and Search Procedure F. Hebdon presented a discussion on sequence coding. He said that the other information sytems in the aerospace field and in the energy field were evaluated; they were determined to be inadequate. The current computerized LER system is a system of abstracts and does not contain the supplemental information usually provided in the followup. reporting systems for LERs.
In key word processing, associations are lost between words.
The search strategies possible with the sequence coding system were described.
Lipinski asked about the problems of coding non standard component names. Hebdon stated that this problem was being addressed.
Hebdon also said that the LERs are not edited by the personnel doing the coding.
The coders are at NSIC in Oak Ridge. The Coders use only the information provided with the LER and are not authorized to contact utilities for any additional informa-tion or clarification.
Approach T. Wolfe discussed the technical aspects of sequence coding. The format and the codes were explained. Wolfe showed a coded LER and explained that the computer is programmed to provide a definition of the codes upon request. Zudans remarked that it would be more useful to have a program that could translate English into the code. Michelson said that this could be done in the future. At present, a dictionary of terms is used.
Zudans also asked about the qualifications of the coders. Wolfe was not sure. Michelson stated that all coders had engineer-ing degrees.
Revised Reporting Hebdon discussed the Integrated Operational Experience Reporting System (10ERS).
The deficiencies in the Nuclear Plant Reliability Data System (NPRDS) were listed. Deficiencies in the LER system were briefly listed. Efforts to correct
LER Meeting 9/9/81 the deficiencies were described. The deficiencies of NPRDS should be addressed now that the Institute of Nuclear Power Operations (INPO) is taking over the responsibility and funding. The LER system is being modified by AE0D. It was stated that nonsignificant LERs clutter the LER data system and that the reporting requirements need to be changed. NPRDS could pick up where the LER system leaves off.
Hebdon briefly discussed SECY-81-494, which seeks Commission approval of a Federal Register Notice of Proposed Advance Notice of Rulemaking. The notice will inform the public of the following:
1.
Defer rulemaking that would establish the Integrated Operational Experience Reporting System.
2.
Develop a proposed rule to modify and codify existing LERs.
3.
Endose the INP0 to fund and mange NPRDS.
4.
Encourage INPO to assure that NPRDS is set-up to meeting industry and NRC needs to support probabilistic risk and reliability assessment programs.
Members of the Subcommittee expressed agreement with proposals discussed in SECY-81-494.
Concluding Statements Mr. Mathis suggested that AE0D provide presentations on items at the 257th ACRS meeting:
1.
INP0/NSAC agreement.
2.
AE0D Screening Process.
3.
Sequence Coding and Search Procedure.
4.
Recommendations in SECY-81-494.
The meeting was adjourned at 12:45 p.m.
Note A transcript of the open portion of the meeting is available in the NRC Public Document Room at 1717 H Street, N.W., Washington, D.C., or can be obtained at cost from Alderson Reporting, 400 Virginia Avenue, S.W.,
Washington, D.C. 202/554-2345.
LER 9/9/81 Meeting 1
APPENDIX A List of Documents Submitted to the Subcomittee and its Consultants.
1.
Introductory Statement by ACRS Evaluation of Licensee Event Reports Subcommittee Chairman - W. Mathis.
2.
Preventing the Reoccurrence of LERs. Memorandum to W. Mathis from D. Moeller.
3.
Office for Analysis and Evaluation of Operational Data 7 slides, J. Heltemes.
4.
Case Study:
Safety Concerns With Pipe Breaks in the BWR Scram System, 11 slides, S. Rubin.
5.
LER Screening, 8 slides, C. Michelson.
6.
Sequence Coding and Search Procedure,10 slides, F. Hebdon.
7.
Sequence Coding and Search Procedure Features,11 slides, T. Wolfe.
8.
Integrated Operational Experinece Reporting System (10ERS), 6 slides, -
F. Hebdon.