ML20125D911

Engineering Change Authorization 113 Re Relocation of Sensing Nozzle Level & Deletion of One of Three Sets of Level Sensing Nozzles on Pressurizer.Diagram of Proposed Relocation of Pressurizer Level Sensing Nozzles Encl

ML20125D911
Person / Time
Site:	Three Mile Island
Issue date:	05/28/1971
From:	Merchant J BABCOCK & WILCOX CO.
To:	Mcfarland J BABCOCK & WILCOX CO.
References
TASK-TF, TASK-TMR NUDOCS 8001170772
Download: ML20125D911 (3)

Text

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l 4 1 Page 2 l PDS-21023-1 B&W Engr. Change No. : Lys. Chg. Contract: 620-0008 l

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2. $8,380 for two nozzica at the existing location. '

i The Fluid Systems Equipment Section reco:::.cnds this chance.

Three level trancndtters are uced to provide redundancy becauce it is a very important )

parameter. Three seta of nozzles were specified in the event DRL required us to add a ',

high level reactor trip. IIowever, reactor coolant flow rate is used in the reactor protective system and there is only one set of nozzles on each flow tube. One ret of  ;

level sencin6 nozzles can be diminated now at a coat savinga; they cannot be climinated 1 after they are installed. Level sensing nozzles can be added later, should it be deter- I mined that they are required. I I

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