ML20235W912
| ML20235W912 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/16/1987 |
| From: | Zech G NRC OFFICE OF SPECIAL PROJECTS |
| To: | |
| Shared Package | |
| ML20235W908 | List: |
| References | |
| 50-327-87-36, 50-328-87-36, NUDOCS 8707230774 | |
| Download: ML20235W912 (2) | |
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ENCLOSURE 1 l
Tennessee Valley Authority Docket Nos. 50-327 and 50-328 l
Sequoyah Units 1 and 2 License Nos. DPR-77 and DPR-79 l
l During the Nuclear Regulatory Commission (NRC) special inspection conducted on May 26 - June 5,1987, a violation of NRC requirements was identified.
The violation involved a failure to adequately demonstrate operability of the chlorine detection system.
In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1987),
the violation is listed below:
Technical Specification 3.3.3.6 states that two independent chlorine detection systems (CDS), with their alarm / trip setpoints adjusted to actuate at a chlorine concentration of less than or equal to 5 ppm, shall be OPERABLE.
Surveillance Requirement 4.3.3.6 states that each chlorine detection system shall be demonstrated OPERABLE by performance of a CHANNEL FUNCTIONAL TEST at least once per 31 days and a CHANNEL CALIBRATION at least once per 18 months.
Contrary to the above, neither the CHANNEL CALIBRATION nor the CHANNEL FUNCTIONAL TEST have been adequately performed for the period of January 1, 1982 (since the preoperational test phase) to the present, in that the isolation of the control room (the CDS trip function) is not functionally tested using the chlorine detector signal as an initiation signal.
(Note:
one special test was performed at the request of the NRC in 1987.) Both channels of the CDS were considered to be inoperable at the time of the inspection, and to have been inoperable for the period that these tests were not adequately performed.
This is a Severity Level IV violation (Supplement I).
Pursuant to 10 CFR 2.201, Tennessee Valley Authority is required to submit to this Office within 30 days of the date of this Notice, a written statement or explanation in reply including:
(1) admission or denial of the alleged violation; (2) the reason for the violation if admitted, (3) the corrective steps which have been taken and the results achieved; (4) corrective steps which will be taken to avoid further violations; and (5) the date when full compliance will be achieved.
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l' Security or Safeguards infomration should be submitted as an enclosure to facilitate withholding it from public disclosure as required by 10 CFR 2.790(d) or 10 CFR 73.21.
FOR THE NUCLEAR REGULATORY COMMISSION sys_
Gary G. Zech, Assistant Director, Inspection Programs Division of TVA Projects Office of Special Projects Dated at Atlanta, Georgia this /Gq day of July 1987 l
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