ML20202H566
| ML20202H566 | |
| Person / Time | |
|---|---|
| Issue date: | 07/31/1986 |
| From: | NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | |
| Shared Package | |
| ML19292F593 | List: |
| References | |
| NUDOCS 8607160368 | |
| Download: ML20202H566 (16) | |
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NINTH SEMIANNUAL STAFF EVALUATIGN 0.f THE STATUS OF THE NPRD SYSTEM July 1986 4
Prepared by:
Office for Analysis and Evaluation of Operational Data NOTE - The NRC has agreed not to release plant-specific NPRDS' data.
Thus removal of Attacnment A is necessary prior to release of this document outside the NRC.
Enclosure 8607160368 860714 PDR ORG NEXD
i l
INTRODUCTION The pre:ent NPRD System is a voluntary program for the reporting of reliability data associated with selected components and systems in nuclear power plants.
Since January 1, 1982, the NPRD System has been managed and operated by the Institute of Nuclear Power Operations.
BACKGROUND Former President Carter's 1977 National Energy Plan recommended that the NRC make mandatory the voluntary reporting of minor mishaps and component failures (i.e.,NPRDS). The plan suggested that mandatory participation would enable the industry and the NRC to develop a more reliable database which is needed to improve the reactor design, construction, operation, safety, and reliability.
Coincident with the NRC's activities directed toward implementing the President's recommendation, the General Accounting Office (GA0) reviewed the 1
NRC's data-gathering activities concerning unscheduled events at commercial nuclear facilities.
In a report issued in late January 1979, the GA0 concluded that it was unlikely that the NRC could justify mandatory NPRDS participation when factors such as additional industry costs, limited expected safety benefits, and duplication of the NRC's LER system were considered.
However, the GA0 believed that a full examination of the issue was warranted and suggested that the issue be decided using rulemaking procedures.
Following an April 19, 1979 Commission briefing on the collection and analysis of operational safety data, the Commission concurred with the January 1979 GA0 recommendation that rulemaking be used to decide the question of whether to make NPRDS reporting mandatory. Accordingly, an Advance Notice of Proposed Rulemaking (ANPRM) was approved by the Commission, and published in the Federal Register on January 30, 1980 (45 FR 6793). Numerous public comment letters were received in response to the ANPRM. The predominant message in the comments was overwhelming opposition to making participation in NPRDS mandatory.
Despite the opposition to a mandatory system, the staff identified a strong need for failure rate data and engineering data. The requirements for such data indicated a need to revise and reorient the system, in combination with the existing LER system, and to assure its effective implementation through NRC rulemaking.
In order to obtain the necessary improvements in the LER and NPRDS reporting programs, the staff conceptually developed a revised reporting systems. This Integrated Operational Experience Reporting System (I0ERS) would have combined and restructured the NRC LER system and the voluntary NPRD System. The 10ERS concept included two principal features:
(1) the collection of detailed technical description of significant events, and (2) the collection of component reliability data.
While the staff still believed that both types of data were essential to the NRC mission, the possibility arose that the NRC could obtain the needed reliability data without assuming direct responsibility for its collection. On June 8, 1981, the INP0 Board of Directors decided that because of its role as an active user of NPRDS data, INP0 would assume responsibility for management of NPRDS.
- Further,
.' INP0 proposed developing criteria,to be used in their management audits of member utilities to assess the adequacy of NPRDS participation. Therefore, rather than preempt the INP0 activities by proceeding with the 10ERS rule-making, the staff recommended and the Commission approved (SECY-81-494),
proceeding to modify and codify the existing LER reporting requirements as a separate rulemaking while holding the 10ERS rulemaking in abeyance.
In approving SECY-81-494, the Commission directed that the staff closely monitor the status and rate of improvement of the NPRD System and provide the Commission with semiannual status reports on the effectiveness of INP0 management of the NPRD System.
In order to monitor the completeness and quality of NPRDS data, AE0D estab-lished an evaluation program, with technical support from the Reliability and Statistics Branch, EG&G Idaho. The initial purpose of this program was to provide a baseline of information concerning the completeness and quality of the NPRDS failure reporting and engineering data files as they existed prior to INP0's assumption of responsibility for the management of NPRDS.
Subsequent analyses of the completeness and quality of the files are being conducted periodically in order to provide a measure of the improvements in the NPRD System under INP0 management and technical direction.
The scope and results of this evaluation program have been discussed in reports to the Commission dated July 1, 1982 (SECY-82-279), January 4, 1983 (SECY-83-4),
July 5, 1983 (SECY-83-4A), January 27, 1984 (SECY-84-44), August 1, 1984 (SECY-84-44A), February 8, 1985 (SECY-85-56), August 20,1985(SECY-85-56A),
and January 30, 1986 (SECY-86-35).
In the third quarter of CY 1984, INP0, working with individual plants began an extensive quality assurance review of all of the engineering data records (approximately 226,000 records) in the data base. The effort, called "rescoping", was necessary to conform the information in the NPRDS data base to revisions to the NPRDS Reportable System and Component Scope Manual and the NPRDS Reporting Procedure Manual.
The rescoping involve -mm---mmaws-,-.-
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I ABLE 7. QUALl!Y OF NPRDS FAILURE REPORTS l'irst Quarter Second Quarter Third Quarter Fourth Quarter First Quarter CY 1985 CY 1985 CY 1985 CY 1985 CY 1986
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1%)
11 ]
11 l
6%
l tiesired Adequ4te 80% l>91%
45%
I4%
31%
82%
30% > 89%
35% > 86%
l l
l i
I 28%
l 50%
j 58%
l 45%
l Probably 1/1 l
J d
d adequate s
Inadequate 3%
26%
181 11%
14%
8 Total number of 106 14 106 85 84 M'RD-4 f orms evaluated One plant had no failure reports during the first quarter 1986.
a.
I
.