ML20235P144
| ML20235P144 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/29/1987 |
| From: | Papanic G YANKEE ATOMIC ELECTRIC CO. |
| To: | Fairtile M NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| FYR-87-106, NUDOCS 8710070189 | |
| Download: ML20235P144 (2) | |
Text
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Telephone (617) 872-8100 TWX 710 380 7619 YANKEE ATOMIC ELECTRIC COMPANY
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l M*L Nr 1671 Worcester Road, Framingham, Massachusetts 01701
.YAN KEEf September 29, 1987 FYR 87-106 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Attention:
Mr. Morton Fairtile, Project Manager Project Directorate I-3 Division of Reactor Projects I-II
References:
(a) License No. DPR-3 (Docket No. 50-29)
(b) Letter, USNRC to YAEC, dated May 18, 1987 l
(c) YAEC Report 1561, "The Auxiliary Power System Voltage Study for the Yankee Nuclear Power Station," dated l
August 22, 1986 1
Subject:
Verification of DAPPER Computer Code to Calculate Electrical j
l Distribution System Voltages l
Ger_tlemen:
i As requested in Reference (b), we have performed verification tests of the DAPPER (Distribution Analysis for Power Planning Evaluation and Reporting) computer program, used to perform the Yankee Plant's Auxiliary Power System Voltage Study, Reference (c).
l The DAPPER program and system model were used to calculate voltages with l
actual measured loading and the Low Pressure Safety Injection (LPSI) pump l
motor-starting load assumptions used in Reference (c). A summary of the I
results of the steady state and motor-starting transient case is attached.
l A comparison of bus voltages calculated by DAPPER to actual measured bus voltages demonstrates that the computer code, system model, and LPSI pump motor-starting assumptions previously used are valid.
If you have any questions or require further information, please contact us.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY 2
(1/ d
- Georg Papanic, f. r.
Senior Project Engineer GP/25.152 Licensing Attachment I
cc:
USNRC Region I USNRC Resident Inspector - YNPS g[
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