ML18142A837

R.E. Ginna - Forwards Response Letter of 12/17/1976 Requesting Additional Information Regarding Appendix I Evaluation

ML18142A837
Person / Time
Site:	Ginna
Issue date:	01/19/1977
From:	White L Rochester Gas & Electric Corp
To:	Schwencer A Office of Nuclear Reactor Regulation
References
Download: ML18142A837 (8)

Text

NRC FORM 195 U.S. NUCLEAR REGULATORV C ISSION DOCKET NUMBER I2-70) 50-244 F <LE NUMBE R NRC DISl RIBUTION FoR PART 50 DOCKET MATERIAL a

FROM: DATE OF DOCUMENT Rochester Gas & Electric Corp. 1/19/77 Mr. A. Schwencer Rochester, New York DATE RECEIVED L. D. White, Jr. 1/24/77 jgLETTE R CI NOTO R I Z E D PROP INPUT FORM NUMBER OF COPIES RECEIVED ~

ORIGINAL )5VNC LASS I F I E D Qcor v I One signed DESCRIPTION ENCLOSURE Ltr. w/attached...re our 12/17/76 ltr...

furnishing response to our request for additional'nformation with regard to the Ginna Appendix I evaluation... lt PLANT NAME'.

E. Ginna fjl ACKNOWLEDGED ..-

APPENDIX I DISTRIBUTION AFTER ISSUANCE OF A LICENSE (3-P)

DO NOT RKMOVI SAFETY FOR ACTION/INFORMATION 1 25 77 BRANCH CHIEF: (3) Schwencer PROJECT MANAGER Wambach

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IIIZj~jgZ ZZrZZ IIIIjIIjt I IIIIIIIIII ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y. 74649 LEON D. WHITE, JR, YCLCPNONC YICC PRCSIDCNT ARCA CODC 7IC 546-2700 3

January 19, 1977 9EcBvEO

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Mr. A. Schwencer, Chief Operating Reactors Branch Division of Operating Reactors Il @~EM'he U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Schwencer:

enclosed material has been prepared in response to your letter of December 17, 1976 requesting additional information with regard to the Ginna Appendix j: evaluation. Forty copies are being enclosed for your convenience.

Very truly yours, L.D. White, Jr.

Enclosure 6

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Response to NRC Additional Information Requests, Appendix I R. E. Ginna Nuclear Power Plant Res onse 'to I'tern 1 Condensate Demineralizer. S stem l.a Average flow rate through demineralizers Based upon an expected flow fraction of 0.69 of the total steam flow, the average flow rate through the demineralizers is calculated to be 4.6 x 106 lb/hr.

l.b Demineralizer type D~ee bed l.c Number and size of demineralizers Pour units will be installed, three for simultaneous operation and one for standby. Each unit contains 204 ft3 of 50/50 anion/cation resin.

led Regeneration frequency The regeneration frequency for the condensate demineralizer system is assumed to be 3.5 days per demineralizer according to NUREG-0017. This value is then multiplied by the number of de-mineralizer units (4) to obtain a regeneration time of 14 days for the entire system. It is estimated, however, that the actual condensate demineralizer regeneration frequency may be on the order of 10-14 days per demineralizer or a regeneration time of 40-56 days for the entire system.

1 e Indication whether ultrasonic resin cleaning is used and the waste liquid volume associated with its use.

No ultrasonic cleaning is planned for use.

Regenerant .volume and activity..

NUREG-0017 assumes a regenerant flow rate of 3400 gpd (1.24 x 106 gallons per year). If one assumes a regeneration frequency of 3.5 days per demineralizer according to NUREG-0017, this results in approximately 104 regenerations per year. The volume calculated for each demineralizer regeneration is then 1.19 x 104 gallons. More realistic estimates indicate that

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each regeneration will produce 20,.000 gal. of low con-ductivity waste which is retained in a separate storage tank and reused in future regenerations as rinse and sluice water. Each regeneration will also produce from 28,250 gal. to 35,750 gal. of high conductivity waste which must be neutralized and disposed of.

These volumes will be generated every 10 days to 2 weeks under normal operating, conditions.

Using the assumptions of NUREG-OOl7, the total annual release from the plant due to regeneration waste is calculated to be 4.6 curies/yr. However, it is not expected that operation of the condensate demineralizer system would be maintained during periods of significant primary-to-second leakage in the plant.

Res onse to Item 2 Neteorolo ical Parameter Ad'ustments Extrapolation of wind speeds measured at the 50 ft.

elevation to the 33 ft. level was performed using the mathematical relationship given in Appendix D, Volume 2 of the Ginna Environmental Report (1972).

Temperature differential data were adjusted to represent LT l50 ft-33 ft from actual dT l50 ft lO ft measurements by employing a logarithmic correction factor of 0.56.

The correction factor, P, was calculated'n the following manner:

P = 1n 150 fn = 0.55 33 fn ln l50 10

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