ML20062N659
| ML20062N659 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/07/1994 |
| From: | Denton R BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9401190011 | |
| Download: ML20062N659 (3) | |
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BALTIMORE GAS AND ELECTRIC 1650 CALVERT CLIFFS PARKWAY LUSBY, MARYLAND 20657-4702 ROBERT E. DENTON VICE PRESIDENT NuctEAR ENERGY
{480)760 edS5 January 7,1994 U. S. Nuclear Regulatory Commission Washington,DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2: Docket Nos. 50-317 & 50-318 Emercency Diesel Generator Uocrade Proicct - Oualification Testine
REFERENCES:
(a)
Letter from Mr. R. E. Denton (BG&E) to Document Control Desk (NRC), dated August 17, 1993, Emergency Diesel Generator.
Upgrade Project (b)
Ixtter from H. Silver (NRC) to W. S. Wilgus (FPC), dated September 25,1989, Crystal River Unit 3 - Pre-Operational Testing of the Upgraded Emergency Diesel Generator As requested in a phone call with the Nuclear Regulatory Commission (NRC) Staff on December 1,1993, we are providing some clarification to our testing program described in Reference (a). Clarification was needed in regard to factory testing and site testing.
FACTORY TESTING The factory testing program being performed on our spare Fairbanks Morse diesel engine is the same series of tests performed in support of qualification of the upgraded emergency diesel generators (EDGs) at Crystal River. We have contacted the manufacturer and they have confirmed that the test program for Calvert Cliffs is the same as that used for Crystal River (given a difference in the ratings of the EDGs). The NRC had previously determined (Reference b) that Crystal River's upgraded EDGs were not previously qualified due to significant design changes, and as such, should meet the type qualification testing and site acceptance testing provisions of Regulatory Guide 1.9 (Revision 2) and Regulatory Guide 1.108, respectively. With regard to type qualification testing, the Staff l
concluded that this requirement was met and no further " type qualification testing" would be required given that the site acceptance testing was successfully implemented. The Staff based that determination on the tests and analyses performed at the EDG manufacturer. Since we are performing the same modification as done at Crystal River, and we are performing the same series of factory tests on our spare EDG as performed for Crystal River, we also assume that " type qualification testing" is not required for our EDGs, assuming our site testing program is successful.
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9401190011 940107 4
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Document Control Desk January 7,1994 Page 2 An additional clarification is provided in regard to the factory testing to verify the proposed 200 hour0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> and 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> ratings. Fairbanks Morse will test the diesel at ratings appropriate to support-verification of the 200 hour0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> and 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> ratings we have requested (3500 kW and 3300 kW,-
respectively). The diesel engine will not be run exactly at those ratings for the entire test period.
The tolerances specified by Fairbanks Morse for the testing are +1/-0 percent of the rating. These tolerances are more stringent than those used during the factory testing of the Crystal River EDG
( 1 percent). It should also be noted that the upgraded ratings will not become effective until the factory testing at those ratings is complete. Until then, we will maintain the existing ratings of the EDGs.
SITE TESTING For the Imad-Run test, we will demonstrate the emergency load carrying capability of not less than 90-100 percent of the diesel's continuous rating (2700 to 3000 kW) for one hour after the engine reaches steady state temperature.
The stable rated voltage and frequency referred to in the Fast Start test are 4160 420 volts and 6011.2 Hz, respectively. The time limit is 5; 10 seconds.
For the Hot Restart test, we intend to restart the engine within five minutes of shutting it down after the engine has run for two hours at 90-100 percent of the continuous rating (2700 to 3000 kW). The two hours is assumed to start after the engine has reached steady state operating temperature.
We developed our Reliability test program based on the guidance provided by the NRC to Crystal River (Reference b). The guidance requested that Crystal River perform 30 start and load tests by slow starting the diesels from ambient (pre-warmed and pre-lubricated) conditions. Our testing program is identical to Crystal River's testing program in every way except the number of successful reliability start and load tests. Based on the guidance provided in Regulatory Guide 1.9, Revision 3, we have chosen to do 25 start and load tests to determine the reliability of the diesel generator.
Based on the guidance given to Crystal River (Reference b), which they subsequently followed, we intend to perform many, if not all, of the reliability starts as slow starts from pre-warmed and pre-lubricated conditions.
One additional point needs to be made concerning the ability of the generator to handle the l
increased ratings which we will achieve by upgrading the diesel engine. We sent a spare generator to the generator manufacturer (Louis Allis) where it was tested for the upgraded ratings. The generator is now at Fairbanks Morre, where it is attached to the spare diesel engine and is undergoing testing at the upgraded ratings. The generator is capable of handling the upgraded ratings.
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Document Control Desk January 7,1994 Page 3 t
t Should you have any questions regarding this matter, we will be pleased to discuss them with you.'
Very truly yours,
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D. A.Brune, Esquire J. E. Silberg, Esquire R. A. Capra, NRC D. G. Mcdonald, Jr., NRC T. T. Martin, NRC l'
P. R. Wilson, NRC R. L McLean, DNR J. H. Walter, PSC i
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