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Alternate Pressurizer Level Methods
	ML19221A572
Person / Time
Site:	Crane
Issue date:	04/03/1979
From:	; Office of Nuclear Reactor Regulation
To:	;
References
	OSP-790403, NUDOCS 7905230221
	Download: ML19221A572 (4)
	v • d • e

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I f )gl . 3. \\ \\ .up Prinary Source Alternate Source 'e n Parameter of Measurement of ",easurement Sh t S G 'a'i d e Ran ge SPIB-LTl SG-B Sample line as 7} Level level indication g l' S P1 A-LTl SG-A Pressurizer RC1-LT1,2&3 MU14-LT 1&2 Level (MU Tank Level) MU7-DPT 1,2,3,4 (Seal injection flow) ~~ ~~ ~ MU4-DFT (Let-d own flowj Pressurizer Level Alter-natc. Calcula-tion Procedure Procedure: Sten 1 - :ecord let-down fi cw at i n cA r en e n t s u s in g MU - DPT Steo 2 - Record RC pump seal i nj ec t ion flow at increments using MU7-DPT 1,2,3 & 4 Step 3 - Record MU tank level at increment using MU14-LT 1&2 Step 4 - MU tank volume is 4388 gallons. MU taak galls per inch - 31. Pressurizer volume 11,230 gallons. Pressuricer gallons per inch - 24. Steo 5 - Determine volume of let-down. Item 1 x time increment volume in gallons. = Step 6 - Determines volume of RC punp injection. Item 2 x time incremeat Steo i - Subtract resul' of Step 6 from result of Step 5. Sten 8 - Subtract previous MU tank level from level determined at Step 3. 164 345

s .- Steo 9 - Multiply result of Ster 8 by MU tank volume per inch given in S *.c p 4. Step 10 - Add or subtract the results of Step 9 to the results of Step 7. Steo 11 - Divide the result of Step 10 by pressurizer gallons / inch to obtain the change in pressurizer level. Assumptions: 1. Only source of make up is to RC pump seal. 2. No RC leakage other than let down. 3. Constant RC pressure (Procedure can be modified to accor.modate varying RC pressure) r i64 346}}

ML19221A572

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