ML20125E091

Forwards Revision to 791231 Tabulated Data Item 2.1.3.b Re Info Required on Subcooling Meter.Revisions Reflect Rosemount Model 1153 Pressure Transmitter Accuracy Rather than Model 1152 Accuracy

ML20125E091
Person / Time
Site:	Yankee Rowe
Issue date:	01/21/1980
From:	Kay J YANKEE ATOMIC ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
WYR-80-8, NUDOCS 8001290317
Download: ML20125E091 (3)

Text

Telephone 617 366-90ll TWK 70-390-0739 YANKEE ATOMIC ELECTRIC COMPANY -

WYR 80-8 1

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Januarv 71, 1GRO Un ited S ta te s iluc l ea r Regula tory Com'r.i ss ion Washington, DC 20555 Attention: Of fice of Muclear Reactor Regulation Mr. Harold Denton, Director Reference * (a) License No. DPR-3 (Docket No. 50-29)

(b) YAEC !.etter to USNRC dated 12/31/79 (79-163)

Daar Sir:

Subject:

Information Roquired on the Subcooling Meter This letter forwards a revision to the tabulated data provided in Reference (b) for Item 2.1.3.h, Informatinn Required on the Subcooling Meter.

These revisions are based on additional vendor information on instrument accuracy. Uncertainty calculations, previously based on the Rosemount Model 1152 pressure transmitter accuracy (+2.75%), have been revised to reflect the Model 1153 accuracy (+,5%). These revisions are indicated by lines in the right hand margin.

If you have any questions, please contact us.

Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY

. G J. A. Kay Senior Engineer - Licensing JAX/kaf Attachment 8001290 D I3

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'l a n;',o af hisplay a Pipit Disn'*v Qualifications (seismic, en v i ronnen t ,1, IEEF 323) IrEE ??3 - 1975 i T e r;E 3 '. i - !n75 Calculator Type (process computer, der'icat ed d i gi t al or analog calculation) Micrnprocessir l l

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Single or redundant calculators Sinale Selection Logic (highest T., louest press) T5igh, plev Qualificatione (seismic, environmental, IEEE 323) IEEE 323 - 1074 IEN 't4 - 107; Calculational Technique (Steam Tables, Functional Fit, ranges) Steam Tables Input Temperature (RTD's or T/C'sT T/C's Teripe ra t u r e (num'wr of sensors and locations) 4 core exit Range of Temperature sensors o- 7000r

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Pn:c-tsinty# of pressuro sensors (r4I at li S"e '.o1 e 1 qual i ficat ions (seismic, e nv i ronme nt a l I r.E E 32 '? ) See "nte 3 Backup Capability

.\va i l a' i l i t y o f Te:,pa ra t o re and Pre: sore Yes A v a i l i h i '. i t y of Steam '!Ples, etc. Yes TreIning of Operator- Ye*

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2. Yankee is currentlv varifying the qualification of the core exiL T/C's.

3. The existing pressure sensor is a Rosemount 1152 and in qualified Ln IEEE 323-1071 and IF.EE 344-107 5. The ner pres.sure sensor is a 1:osenount 1153 and is qualified to IEEE 12 3- 1"74 a n1 I EE:E 344-10 7 5.

Transmi t ter '% del  ??ormal Accuracy Accident Accuraev 1152 + . 2 "s" + 9.757 1153 + . 2 5 "' + 5" t