ML19322D192
| ML19322D192 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/09/1977 |
| From: | Williamson R METROPOLITAN EDISON CO. |
| To: | Rogers L METROPOLITAN EDISON CO. |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8002100038 | |
| Download: ML19322D192 (2) | |
Text
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st SITE INSTYUCTio3 No. _rl!.f5____...._ _
T'HE'BABC0CK & WILC0X COMPANY DISTRIDUTION _ _ _ _G_ _ _ _ _ _ _ _ _ _ _ _ _.. _ _ _
"0WER GENERATION GROUP Y
lL.C. Rogers-SiteOperationsManager,Three is d,
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APPROVED AM dc_; $;__ T._ /IJ,'?1 M M /AMrrc.erK
'E From R. P. Williamson - Plant Startup Services Section (3180) ses 663.5 Cust. JCP&L File No. NSS-6/T3.5 or Ref.
Subj. Allowable RC Flow Rates - Correction to SI 6/108 Date Dec. 9, 1977 j
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The maximum allowable RC flow rate through the reactor core with four RC pumps operating is incorrectly specified in SI 6/108 as 430,600 gpm. The calculated flow rate to initiate core lift is 410,000 gpm at an RC temperature of 520*F.
As RC temperatures increase above 520*F, the core lift force will decrease for a constant volumetric RC flow rate. The maximum expected RC flow rate is 393,600 gpm, thus leaving an expected margin of 4.2%.
Please advise the customer of these revised values. Contact R. W. Winks or myself if there are any questions on this instruction.
RPW:NF
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W. H. Spangler L. R. Pletke K. R. Ellison
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D. F. Hallman R. W. Winks J. D. Dempsey C' A M*7'"
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