ML20235Z063
| ML20235Z063 | |
| Person / Time | |
|---|---|
| Issue date: | 01/05/1989 |
| From: | Rossi C Office of Nuclear Reactor Regulation |
| To: | Holahan G, Varga S Office of Nuclear Reactor Regulation |
| References | |
| IEB-88-010, IEB-88-10, NUDOCS 8903150101 | |
| Download: ML20235Z063 (2) | |
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'o, UNITED STATES NUCLEAR REGULATORY COMMISSION o,
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JAN 0 51999 RECElVED BY l
MEMORANDUM FOR: Steven A. Varga, Director Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
'89 MAR -3 A7:58 Gary M. Holahan, Acting Director Division of Reactor Projects - III, IV, V Office of Nuclear Reactor Regulation FROM:
Charles E. Rossi Director Division of Operational Events Assessment Office of Nuclear Reactor Regulation
SUBJECT:
INTERPRETATION / CLARIFICATION OF BULLETIN 88-10; NONCONFORMING MOLDED-CASE CIRCUIT BREAKERS Several addressees of the subject bulletin have inquired about the possibility of not testing molded-case circuit breakers (C s) in stores that are not traceable to the circuit breaker manufacturer CBM) even though their trace-ability of stored CBs is greater than 80 percent (see item 3 of the actions requested). These addressees wish to identify those CBs in stores that are not traceable to the CBM, specify that these CBs are not to be used in safety-related applications, in accordance with item 7 of the actions requested, and proceed directly to determine the traceability of CBs installed in the plant as specified by item 4 of the actions requested.
The NRC agrees that testing of spares need not be perfomed provided the following actions are takten:
- All addressees are requested to identify and trace all molded-case CBs in stores as specified in item 1 of the actions requested.
- Addressees who elect not to perform the testing requested by item 3 of the bulletin actions are requested to perform items 4 and 5 of the actions requested regardless of the traceability results of item I.
- All addressees are requested to forward in their written reports the infomation on CBc that are found not to be traceable to the CBM.
- Addressees who do not perform the bulletin actions as requested, such as not performing any testing of CBs in stores are to indicate that fact in their written reports; the current bulletin reporting require-ments specify that addressees are to confirm that they have completed or will implement the actions as requested by the NRC.
CONTACT: Jaime Guillen NRR 0F#
492-1170 3/
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JM 0 5198g Multiple Addressees In addition, the Office of Investigations and the Vendor Inspection Branch are requesting that addressees retain those CBs that are found to be nontraceable to the CBM for a period of at least six months after identification. These breakers are needed to support NRC investigations of suspect electrical equip-ment distributors, suppliers, or manufacturers.
The use of non-traceable breakers in non-safety-related applications will be
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evaluated after the NUMARC initiative for such breakers has been reviewed by the NRC.
If you have any questions regarding this matter, please contact Paul Gill (X20811) or Jaime Guillen (X21170).
Charles E. Rossi, Director Division of Operational Events Assessment Office of Nuclear Reactor Regulation 8