ML19247A254
| ML19247A254 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/23/1979 |
| From: | Groce R Maine Yankee |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| WMY-79-75, NUDOCS 7907300441 | |
| Download: ML19247A254 (2) | |
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wg 3Q R"f 79-75 July 23, 1979 United States Nuclear Regulatory Commission Washington, D. C.
20555 Attention: Office of Nuclear Reactor Regulation
References:
(a) License No. DPR-36 (Docket 50-309)
(b) USNRC Letter co MYAPC, daced May 25, 1979 (c) MYAPC Letter to USNRC, dated November 25, 1977 (RIY 77-104)
Dear Sir:
Subject:
Stean Generator Feedwater Piping This letter responds to the retaining itets from Reference (b) concerning the stea2 generator feedwater piping at Maine Yankee Atonic Power Station:
1.
The nossle to piping welds were radiographed following welding.
2.
The feedvater piping was fabricated in accordance with ANSI B31.1-1967, Power Piping.
3.
No fracture toughness requircnents were specificc.
4.
No pre-service exaninations were perf orced on this piping sir.ce the plant correnced cperatien prior to the issuance of Safety Class 2 piping requirecents in Section XI.
5.
No inservice inspections have been perforced on this piping.
6.
One steam generator norrle to pipe veld will be included in the Safety Class 2 inservice inspection progran during the 1980 refueling in January - February 1980.
7.
Reference (c) prcviously provided information on 'caterhatrer in f ecfwater piping at "aine '.o akee Aton.ic Power Staticn.
8.
Feedwa ter chemistry control is maintained at Maine Yankee in the following.anner:
a.
Careful control of the water trentrent plant, to assure that takeup water is of high c,uality, b.
'ddition ci centro 1]cd arcuntr of corpholine
- ui hydrazine f or pil and mypcn control.
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7907300 Fg
United States Nuclear Regulatory Connission July 23, 1979 Attention: Office of Nuclear Reactor Regulation Page Two Daily analyses of condensate, feedwater and water storage c.
systems to assure t'.t they are within chemistry specs.
d.
Continuous on line tonitoring of condensate for sodium, conductivity and oxygen to provide early detection of cotidenser tube leakage.
Initiate efforts to locate and plug condenser tube leaks as c.
soon as nonitors or laboratory analyses indicate tube leakage.
Feedwater chenistry can be summarized as being normally within the following range:
pH 9.2 - 8.5 Conductivity 1.8 - 3.5 micronhos/cc Chlorides
< 0.01 ppa Fluorides
< 0.10 ppa Oxygen
< 0.02 ppm N,H
< 0.01 to 0.01 ppm
.4 Copper
< 0.05 ppa Total Undisolved Solids 0.01 to 0.1 ppn We trust this information is satisf actory, howaver, should you have any questions, please feel free to contact us.
Very truly yours, MAINE YA"KEE ATOMIC PO',ER COMPANY
/ kh Robert H. Groce Licensing Engineer JRE/sru 1
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