ML20010F516
| ML20010F516 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/03/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Kay J YANKEE ATOMIC ELECTRIC CO. |
| References | |
| TASK-08-02, TASK-8-2, TASK-RR LSO5-81-09-011, LSO5-81-9-11, NUDOCS 8109100308 | |
| Download: ML20010F516 (4) | |
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September 3,1981 Docket No. 50-29 pp LS05 09-011
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Mr. James A. Kay
- l Senior Engineer - Licensing
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Yankee Atomic Electric Company 1671 Worcester Road
'h Framingham, Massachusetts 01701 9
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Dear Mr. Kay:
SUBJECT:
SEP TOPIC VIII-2, DIESEL GENERATORS SAFETY EVALUATION REPORT FOR YANKEE R0 1' The enclosed staff safety evaluation is based on a contractor document that has been made available to you previously. This evaluation is the staff's position regarding design of your facility in the subject area.
With negard to the referenced topic, the staff has concluded that your facility meets current licensing criteria.
Sincerely, Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing
Enclosure:
As stated cc w/ enclosure:
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OFFICIAL RECORD COPY uso. i ei-asswo enc ronu ais oo eo3 Nacu o240
- e. W Mr. James A. Kay YANKEC R0WE Docket No. 50-29 CC Mr. James E. Tribble, President Yankee Atomic Electric Coapany 25 Research Drive Westborough, Massachusetts 01581 Greenfield Community College 1 College Drive Greenfield, Massachusetts 01301 Chairman Board of Selectmen Town of Rowe Rowe, Massachusetts 01367 I
Energy Facilities Siting Council I
14th Floor One Ashburton Place Boston, Massachusetts 02108 U. S. Environmental Protection Agency Region I Office ATTN: EIS COORDINATOR JFK Federal Building Boston, Massachusetts 02203 Resident Inspector Yankee Rowe Nuclear Power Station c/o U.S. NRC Post Office Box 28 Monroe Bridge, Massachusetts 01350 1
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- 9 L4 SYSTEMATIC EVALUATION PROGRAM TOPIC VIII-2 VENKEE R0WE
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TOPIC VIII-2 ONSITE EMERGENCY POWER SYSTEMS - DIESEL GENERATOR I.
Introduction Diesel generators, which provide emergency standby pcwer for safe reactor shutdown in the event of total loss of offsite power, have experienced a significant number of failures.
The failures to date have been attributed to a variety of causes, including failure of the air startup, fuel oil, and combustion air systems.
In some instances, the malfunctions were due to lockout. The information available to the control room operator to indicate the operational status of the diesel generator was imprecise and could lead to misinterpretation.
This was caused by the sharing of a..
single annunciator station by alarms that indicate conditions that render a diesel generator unable to respond to an automatic emergency start single and alarms that only indicate a warning of abnormal, but no disabl-ing, conditions. Another cause was the wording on an annunciator window which did not specifically say that the diesel gene ator was inoperable (i.e., unable at the time to respond to an autcmatic emergency start signal) when in fact it was inoperable for that purpose. The review included the reliability, protective interlocks, fuel oil quality, and testing of diesel generators to assure that the diesel generator meets the availability re-quirements for providing emergency standby power to the engineered safety features.
II. Review Criteria The review criteria are presented for Section 8.3.1 in Table 8-1 of'the Standard Review Plan.
III. Related Safety Tooics and Interfaces The scope of review for this topic was limited to avoid duplication of effort since some aspects of the review were performed under related topics.
Related topics and the subject matter are identified below.
Each of the related topic reports contain the acceptance criteria and review guidance for its subject matter.
III-12 Envit nmental Qualification VI-7.C.1 Incependence of Onsite Power VIII-1.A Degraded Grid XVII Fuel Oil Quality Assurance There are no safety topics that are dependent in the present topic informa-tion for their completion.
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,,6 2-IV. Review Guidelines The review guidelines are presented in Section 8.3.1 of the Standard Review Plan, V.
Evaluation The concern with regard to annunciators was pursued as a generic issue.
The staff safety evaluation for Ginna concluded that in order to pro-vide the operator with accurate, complete and timely information per-tinent to the status of the diesel generators, as required by IEEE Std. 279-1971, the following corrective actions are required:
e 1.
Provide information concerning possible nona: armed conditions which might render the D/G's incapable of automatic start.
i 2.
Licensee was requested by NRC letter dated April 4, 1978 to deter-
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mine if the D/G's are provided with a manual shu'down lockout relay.
t By a letter dated May 10, 1977, the licensee agreed to make suitable modifications to the annunciators.
Also, as a result of the work done by the Universit/ of Dayton, a gen-eric program for implementing most of the recommendations for reliabil-ity enhancement that are contained in the University of Dayton report is being conducted by NRC. This latter program will also determine the adequacy of the diesel generator testing program on a case-by-case basis and enforce any necessary changes.
The question of fuel oil quality was addressed on a generic basis in January 1980, by letters to all licensees. The letters required that licensees include fuel oil in their Quality Assurance program. The Quality Assurance program is addressed in Topic XVII. Until completion of Topic XVII, the periodic testing of the diesels is considered to be an adequate interim method for assuring acceptable quality in the fuel oil stored on site.
Beyond these efforts, EG&G Report 0087J, " Diesel Generators" presents a technical evaluation of the diesel generator protective interlocks and load capability at Ginna against present licensing criteria. The report notes that the diesel-generator protective trips are in agreement with current NRC guidelines.
VI. Conclusion The diesel generator protective interlocks are in conformance with the Branch Technical Position ICSB-17 (PSB).
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