ML20196B853
| ML20196B853 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 11/29/1988 |
| From: | Hunsader S COMMONWEALTH EDISON CO. |
| To: | Murley T NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM), Office of Nuclear Reactor Regulation |
| References | |
| 5243K, NUDOCS 8812070057 | |
| Download: ML20196B853 (2) | |
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pm h CONNRenwoolth Edle0et One First National Plaza, CNeaGo. Illinois
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Address Reply to: Post OfficJ Box 7C CNcago. Innos 60690 0767 November 29, 1988
,4 Dr. Thomas E. Murley, Director
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Office of Nuclear Reactor Regulation j
U.S. Nuclear Regulatory Commission Washington, DC 20555 l
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Attna Document Control Desk Subjects Braidwood Station Unit 1 Application for Amendment to
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s Facility,perating License NPF-72 Appendia A, Technical Specifications l
NRC Docket No. 50-456 I
References (a) October 26, 1988 S.C. Hunsader letter L
to T. E. Murley 4
(b) November 22, 1988 S.C. Hunsader letter t
to T.E. Murley r
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Dear Dr. Murleys f
I In reference (a), pursuant to 10CFR 50.90. Comonwealth Edison
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(Edison) proposed to amend Appendix A, Technical Specifications, of Facility 1
_ Operating License NPF-72.
TLs proposed amendment requests a change to f
I Technical Specification 4.8.1.1.2f to extend, on a one-time basis, the
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I previously accepted 31 month surveillance testing requirement for Diesel Generators 1DG01KA and 1DG01KB, for an additional 7 months, until the first
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refueling outage for Braidwood Station Unit 1, current.ly scheduled for
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September, 1989.
I In reference (b), Edison provided additional information that supported what was provided to the NRC in reference (a).
Attachment "C" to reference (b) provided the results of the ENSPEC 3000 Engine Analper operated
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on Diesel Generators, 1DG01KA and 1D01KB on November 14, and 17e 1988.
The purpose of this letter is to provide to you Edison's evaluation f
of the ENSPEC 3000 Engine analyser results. This is included in Attachment A.
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l Please direct any questions you may have concerning this matter to
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this office.
Very truly yours,
= -_ : :-Q S.C. Hunsader Nucleer Licensing Administrator
/sc1:$243K 8 cca Resident Inspector - Braidwood
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S. P. Sands - NRR Regional office R!!!
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M. C. Parker - Otate of Ill.
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8012070057 891129 I
PDR ADOCK 05000456
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(P PDC 9
s ATTACHMENT A Evaluation of ENSEEC_1DIMLEngine_AnalyzeJ_Resn1_ta On November 14 and 17, 1988, the ENSPEC 3000 Engine Analyzer was set up and operated on Braldwood Station's I A (Serial Number 7175) and 1B (Serial Number 7176) diesel engines. The data from the engine analysis was submitted to the NRC on November 22, 1988 with a Cooper Energy Services Group cover letter dsted November 17, 1988.
The Identification number on the data sheets associated with each measured parameter is interpreted ast (1) the first four digits being the engine serial number, (2) the second four digits being the date of data acquisition, and (3) the final digits being the cylinder number.
The data presented in the Povember 17, 1988 letter of Speed (N), Net Positive Cylinder Horsepower (H+), Nat Negative Cylinder Horsepower (H-), Indicated Mean Effective Pressare (IMEP), Peak Pressure (PP), Pressure Angle (PA), and pressure versus volume plots is analysed by the Cooper field Service Representative and interpreted based on his year of experience and knowledge of working with KSV-20 engines.
The acceptance etiteria for engine firing pressures is taken from Cooper-Bessmer Service News Bulletin 711.A dated December 4, 1987 which states "the maximum engine average firing pressure, at rated load and speed, is 1690 psi when an electronic Indicator is used to obtain this value" and the Bulletin also states that "the -szlmum firing pressure variation between cylinders is 160 psi".
The average of the 20 peak firing pressures for the 1A diesel gives 1627 psi. The maximum variation is between cylinder 19 and cylinder 3 for the 1A diesel at 156 psi, within the 160 psi limit. The average of the 20 pesk firing pressures for the IB diesel is 1600 psi with a maximum variatlori between cyllncer 2 erd 8 at 127 psi.
Cyllnder compression pressuras were also obtained. The acceptance critera per the Technical Specificatlun Surveillance Procedure is that the compression pressure for each cylinder be greater than 535 psig.
All obtained values were greater than the acceptance criteria, with the lowest pressure being 572 psig for the 1A diesel ar.d 571 psi for the IB diesel.
Please note that the compression pressutec wete not part of the original transmitted date.
Cylinder vibration and pressure versus volume plots were also obtained using the ENSPEC 3000 with acceptable results.
Braldwood station has utilized Cooper Energy Services for performance of the diesel engine analysis and use of the ENSPEC 3000 analyser to obt ain a measure of the engine performance that exceeds that required by our 18 month inspection procedures.
/sc1:5243K 9
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