ML18046B023
| ML18046B023 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 10/29/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-08-02, TASK-8-2, TASK-RR LSO5-81-10-052, LSO5-81-10-52, NUDOCS 8111040304 | |
| Download: ML18046B023 (5) | |
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October 29, 1981 J
Docket No. 50-255 LSOS l 0-052 Mr. David.P. Hoffman Nuclear Licensing Administrator C~nsumers Power Company 1~~-5 W Parnal 1 Road Jackson, Michigan 49201
Dear Mr. Hoffman:
SUBJECT:
SEP TOPIC VIII-2, ONSITE EMERGENCY BOWER SYSTEMS - DIESEL GENERATOR, SAFETY EVALUATION FOR PALISADES The enclosed staff safety evaluation has been revised to reflect the contents of plant drawing M12 Sheet 17 Revision 17.
We now conclude that the present design f s acceptable.
Enclosure%
As stated cc w/enclosure:
See next page
- Sincerely,*
Dennis M. Crutchfield, Chief Operating.Reactors Branch No. 5 Division of Licen~fng
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Mr. David P. Hoffman r
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Isham, Lincolri & Be-are**
Suite 4200.
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One First National Plaza Chica~_o, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company **
Consumers Power Company 212 West Michigan_Avenue Jackson, Michigan *-49201--: --
Myron M. Cherry, Esquire Suite 4501 One IBM Plaza
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Chicago, IllinoiS-: 60611.-:-*:- :-:-.:-"'."..
Ms. Mary P. Sinclair Great Lakes Energy Alliance 5711 Summerset Drive Midland, Michigan 48640 Kalamazoo Public Library 315 South Rose Street Kalamazoo, Michigan 49006 Township Su-p-erv-isor Covert Township Route l, Box 10 Van Buren County, Michigan 49043 Office of the Governor (2)
Room l - Capitol Building Lansing, Michigan
- 48913 Willi~m J. Scanlon, Esquire 2034 Pauline Boulevard Ann Arbor, Michigan 48103 Palisades Plant ATTN:
Mr. Robert Montross Plant Manager Covert, Michigan 49043 4
U. S. Environmental Protection Agency Federal Activities Branch..
Region v Office ATTN:
Regional Radiation Representative 230 South Dearborn Street Chicago, Illinois 60604
_ *Charles *Bechhoefer,-.E~q.\\ Chai~mari
~- A to-mi c Saf etY and l i ceris i rig Board Pane 1
- - U. S. Nuclear Regulatory Comnis-sion Washingt6n, D. C.
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~ *.: - Dr *. -George -c:~ Ander~or(. ~--;-" :_.,:
Department of Oceanography -- --
University of Washington Seat.tle, Washington 98195:: ~:.
Dr~ M. *stanley-Livingstori 1005 Calle Largo-Santa Fe, New Mexico 87501 Resident Inspector c/o U. S. NRC Palisades Plant Route 2, P. O. Box 155 Covert, Michigan 49043
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- JI s!EMATIC EVALUATION PROGRAM
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TOPIC VIII-2 PALISADES
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TOPI(:
VIIl-2, ONSITE EMERGENCY** POWER SYSTEMS*- DIESEL GENERATOR I.
Introduction Diesel generators, which provide emergency standby power for safe reactor shutdown in the event bf.total ~lo~s of offsite powe~ hav~ ~xp~rienced a
--significant number of failures.* -The-fai1ures to date tiave. been-attributed to a variety of causes, including failure of the air startup, fuel oil, and combustion air system~.
In som.e instances, the malfunctions were due.
-to lockout.
The infonnation 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 tnat indicate conditions that render a diesel generator unable to respond to an automatic emergency start signal and alanns that only indicate a warning of abnormal, but no disabling, conditions.
Another cause was the wording on an annunciator window which did not specifically say that the diesel generator was inoperable (i.e.,
unable at the time to respond tc an automatic 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 avail-ability requirements* for providing emergency standby power to the engineered
- safe~y features.
II.
Review Criteria The review criteria are presented for Section 8.3. l in Table 8-1 of the Standa~d-~eview Plan.
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Re 1 ated Safety Topi cs 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.
Eac~ of the related topic reports contain the acciptance criteria and review guidance for its subject matter.
III-12 VI-7.C.l VIII-1.A XVII Environmental Qualification Independence of. Onsite Power Degraded Grid 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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.. ~~IV.* -R~vi~~ Guidelines The review guidelines are presented in Section 8.3.l of the Standard Review.Plan.
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lhe concern with regard to annunciators was pursued as a generic issue.-
-* The st~ff s~fcty ~~aluation for Palisades concluded thit in order to provide the operator with accurate, complete and timely information pertinent to the status of the diesel generators, as required by IEEE Std. 279-1971, the fol.lowing corr~ctive actions are. required: -,
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- l. Disabling and non-disablin.g conditions, *currently alarmed at a common annunciator station, should be separated and annunciated at separat~ an~unciator points.
2.. The wording on the annunciate~ for disabling conditions shoul~
specifically state:that*the diesel generator is unavail.able for an automatic emergency start~
By a letter dated May 28, 1980, the licensee agreed to make suitable modifications to the annunciators.
Al~o, as a result of the work done by the University of Dayton, a generic program for implementing ITTJSt of the recommendations for re-1 iability enhancement that are contained in the University of Daytol"I 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 cdnsi_dered to be
.an adequate interim method for assuring acceptable quality in the fuel oil stored on site.
Beyond these efforts, EG&G Reoort 0041J, "Diesel Generators" presents a
- technical evaluation of the diesel generator protective interlocks and load capability at Palisade*s against present licensing criteria. The report notes that the diesel-generator bearing oil protective trip is not bypassed during emergency operation. This is not in agreement with current NRC guidelines.
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- However, the staf~ has discovered that our contractor was not provided
- a. copy of plant drawing Ml2 Sheet 17 Revision 17 (ALCO Drawing A9AA73376).
Drawing Ml2 Sheet.17 shows that two oil pressure switches in series must
. (both) close and a 20 second time delay after engine start must be
. satisfied before trip occurs.
This two out of two coincidence satisfies our criteria as.an alternative to bypassing.*
- VI., Conclusion
- .. The staff concludes that the diesel generator protective interiocks *are '
- .in conformance with the Branch Technical Position ICSB (PSB). --