ML19224D071
| ML19224D071 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 07/02/1979 |
| From: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| WYR-79-76, NUDOCS 7907100594 | |
| Download: ML19224D071 (2) | |
Text
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Teleph one 617 366-9011 TwK 710-390 0739 YANKEE ATOSHC ELECTRIC C051PANY B 3.2.1 WYR 79-76
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k 20 Turnpike Road Westborough, Massachusotts 01581
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July 2, 1979 United States Nuclear Regulatory Commissfon Washington, D. C.
20555 Attention: Office of Nuclear Reactor Regulation
References:
(a) License No. DPR-3 (Docket 50-29)
(o) USNRC Letter to YAEC, dated thy 25, 1979 (c) YAEC Letter to NRC, WYR 77-603
Dear Sir:
Subject:
Steam Generator Feedvater Piping This letter provides responses to the remaining items from Reference (b) concerning the steam generator feedwater piping at Yankee Nuclear Power Station.
1.
No recor '_ of any post veld NDE are available.
2.
The feedwater piping was fabricated in accordance with ANSI B31.1-1955, Pcuer Piping.
3.
No fracture toughness requirements were specified.
4.
No preservice examinations were performed on this piping since the plant commenced operation prior to the issuance of Section XI.
5.
No in-service inspection has yet been performed on the f eedwater piping in the area of the feedwater nozzles.
6.
The feedwater piping at the steam generator nozzles for tvo steam generators will be included in the inspection effort for the 1980 refueling at Yankee Nuclear Power Station.
7.
Reference (c) previously provided information on waterhammers in feedwater piping at Yankee Nuclear Power Station.
8.
Feedwater chemistry control at Yankee Rowe is via the AVT method.
Hydrazine is fed continuously to the condensate water in concentrations slightly greater than the measured dissolved oxygen concentration of about 20 ppb.
The thermal decceposition of 7 9 0 710 0 rrl<i 29 non J c. 7 Uuv s
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United States Nuclear Regulatory Commission July 2, 1979 Attention: Office cf Nuclear Reactor Regulation Page Two hydrazine produces amonia. The normal specifications which are produced by this control are:
Feedwater plI:
% 9.0 - 9.2 Conductivity:
% 2 umhos/cm Oxygen:
< 10 ppb Arcionia :
0.5 ppm Ilydra zine :
measurable 0 - 20 ppb We trust that you find this information satisfactory; however, should you require additional information, please contact us.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPA!.T O%
R. II. Groce Licensing Engineer JRil/ sew 7
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