ML20010A340
| ML20010A340 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee, Saint Lucie |
| Issue date: | 08/05/1981 |
| From: | Johnson W Maine Yankee |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FMY-81-116, GL-81-14, NUDOCS 8108110332 | |
| Download: ML20010A340 (2) | |
Text
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2.C.2.1 August 5,,
1981 FMY-81-116 United Stated Nuclear Regulatory Commission Washington, D.C.
20555 Attention: Of fice of Nuclear Reactor Regulation
Reference:
a) License No. DPR-36 (Docket No. 50-309) b) USNRC Le tter to MYAPCO dated February 10, 1981.
(Generic letter No. 81-14)
Subject:
Seismic Qualification of Maine Yankee Auxiliary Feedwater (AW)
System
Dear Sir:
Your letter, Reference (b), requested information concerning seismic design of Maine Yankee's Auxiliary Feedwater System. A review of the system has resulte! In the following:
1.
All piping from the discharge af the auxiliary feed pumps to the steam generator - with the excepticn of small bore minimim flow recirculation piping - was fully qualified ir the <tafe shutdown earthquake during initial <'esign and construc 1x.
2.
The majority of large bore ;uctie piping from the Demineralized Water Storag, Tank to the AW pumps was analyzed for seismic loads.
3.
A field walkdown of small bore branch piping revealt that the desien is for deadwefght, thermal, and pressure loads.
Seismic loads were not considered in the initial design and construction.
I 4
Table 1 of Enclusure I to Reference (b) lists AFW equipment, components and structures.
The table is repeated below with a comment on its status of seismic qualification.
n alification Item u
pol Pumps /Motois Yes y
Piping Partial
//
Valves Yes 8108110332 810805 PDR ADOCK 05000389 F
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United States Nuclear Ragt41 story Commission Pags 2 Attn: Office of Nucisar Rasctor Rsgulation August 5, 1981 Item Qualification Actuators No Power Supplies Yes Primary Water and Tenk-Yes Supply Path Piping-Pa rtial Initiation and Control Yes Structures Supporting or Yes Housing ATW System Items Maine Yankee is currently reaffirming all the previous seismic analyses of the piping system. The scope of the current program will be increased to include the seismic qualification of AEW piping which supplies each steam generator, to the safe shutdown earthquake. Small bore piping will be analyzed by the chart method or a dynamic analysis, and the valve actuators will either be qualified to seismic loads or replaced.
If in the conduct of ti.is program, deficiencies are found in the AEW system, corrective actions will be implemented and physical changes, if necessary, to assure the capability of feedwater delivery to the steam generator, will be accomplished during the next scheduled refueling outage.
We trust this information is satisfactory; however, should you require additional information, please contact us.
Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY s 14$
W.
Johnson Vice President JBR/p1b Commonwealth of Massachusetts )
)ss Middlesex County
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Then personally ~ appeared before me, W. P. Johnson, who, being duly sworn, did state that he is Vice President of Maine Yankee Atomic Power Company, that he is duly authorized to execute and file the foregoing statement in the name and on the behalf of Maine Yankee Atomic Power Company, and that the statements therein are true to the best of his knowledge and belief.
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f5 "h,*. e Robert H. Groce
. Notary Public 1
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My Commission Expires September 14, 1984
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