ML20011D668
| ML20011D668 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 12/15/1989 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20011D666 | List: |
| References | |
| RTR-REGGD-01.118, RTR-REGGD-1.118 50-423-89-16, NUDOCS 8912280217 | |
| Download: ML20011D668 (1) | |
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APPENDIX A NOTICE OF DEVIATION Northeast Nuclear Energy Company Docket No. 50-423 Millstone Unit 3 License No. NPF-49 l-During a routine resident inspection from August 29.'1989 through October 15, 1989 a deviation from your written commitments to the NRC was identified. The deviation involved insufficient testing of the main steam isolation valve (MSIV) safety systems.
In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C, the deviation is listed below:
The Millstone Unit 3 Final Safety Analysis Report (FSAR), Chapter 1.8, Section 1.8 and Table 1.8-1 commits the licensee to full compliance to Regulatory Guide 1.118 (Periodic Testing of Electric Power and Protection Systems), Revision-2, June 1978.
Regulatory Guide 1.118 Paragraph C states, in part, that the requirements and recommendations for the periodic testing of electric power and protection systems contained in the Institute of Electrical and Electronics Engineers (IEEE) Standard 338-1977 are censidered acceptable by the NRC.
The IEEE Standard 338-1977 Section 6.1 states, in.part, operability of each redundant portion of the safety system shall be independently verified where~ practical during reactor operation. Tests which would interfere with normal'or safe plant operation should be scheduled during plant shutdown periods.
Furthermore, Section 1
5.6 states, in part, functional tests may be supplemented by, but not replaced with, continuity checks to determine specific failure modes.
I Contrary to the above as of October 15, 1989, the licensee did not' comply i
with Regulatory Guide 1.118, Paragraph C as committed in the Millstone Unit 3 FSAR Chapter 1.8, Section 1.8 and Table 1.8-1, by not complying with the requirements and recommendations for the periodic testing of electric power and protection systems in the IEEE Standard 338-1977.
Contrary to IEEE Standard 338-1977 Section,6.1, the licensee did not independently verify the operability of each redundant portion of the main steam isolation valve (MSIV) safety system while conducting.MSIV opera-tional tests during plant shutdown periods.
In addition, contrary to the IEEE Standard 338-1977 Section 5.6, the licensee performed continuity checks in lieu of operability checks of the MSIV system, to determine specific failure modes. Continuity checks that were performed did not provide adequate assurance that a MSIV will close in the required five seconds as specified in plant technical specification 3.7.1.5, when only one of the two MSIV actuating systems is operable.
Pursuant to the provisions of 10 CFR 2, Appendix C, Northeast Nuclear Energy Company is requested'to submit to this office, within thirty days of the receipt date of this notice, a written explanation or statement describing corrective steps taken or planned, the results achieved, and the date when corrective action will be completed. Where good cause is.shown, consideration
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will be given to extending this response time.
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