ML20033A821
| ML20033A821 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/23/1981 |
| From: | Hukill H METROPOLITAN EDISON CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| L1L-334, NUDOCS 8111270323 | |
| Download: ML20033A821 (3) | |
Text
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3 Metropolitan Edison Company Post Of fice Box 480 IIyL L
Middletown, Pennsylvania 17057 Writer's Direct Dial Nurnber Novanber 23, 1981 L1L 334 Office of Nuclear Reactor Regulation
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pt p sQ Attn: John F. Stolz, Chief Operating Reactors Branch No. 4 Q
U. S. Nuclear Regulatory Cornission b
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Washington, D.C.
20535
Dear Sir:
Dod u Y "
Three Mile Island Nuclear Station, Unit 1
-1
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Operating License No. DPR-50 N
i Docket No. 50-289 Reactor Building Spray System This letter is in response to followup questions generated fromyour review of our September 3,1981 (LlL 149) letter. We have included as Attachment 1, a family of curves which represent the no failure and single failure case results for LOCA conditions which wilJ cause actuation of the RB Spray System.
You should note that the cases presented cover the system performance charac-teristics for large break LOCA conditions.
Small break LOCA's will not generate conditions in containment that will cause spray system actuation.
The analysis results presented are terminated at either the end of drawdown, or at the point where the systems have reached equilibriuu and the analysis was stopped. depicts the ranges of sump pH for various levels and concentrations, and the anticipated operating windows for the NaOH tank. The window also conferms to equistatic conditions with the BWST when the BWST is within its Technical Specification limits and will support the initial condition to achieve the results shown in Attachment 1.
Should you have any further questions, please let us know.
Sincerely, f
H. D. Iukill Director, TMI-l HDH:EGW:vj f Attachments cc:
F. Jacobs L. Barrett O l R. C. Haynes 5i I
8111270323 811123 PDR ADOCK 05000289 P
PDR Metropohtan toison Company is a Member of the General Pumc Utsties Syttem J
4 ANT 1 THREE MILE ISLAND, UNIT 1 Results of Borated Water - Sodium Hydroxide storage tank draw down during RB Spray Syste= operation.
A Tank Level = 10 ft. BWST vs. NaOH Tank
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ATTACHMEiT 2 Concentration of the sodium hydroxide solution required in the sodium hydroxide storage tank for sarying tank level to maintain a sump pH of 8.5 or 11 assuming BWST Level within 10 feet yff NaOH Tank Level.
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