ML20024G345
| ML20024G345 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 11/03/1972 |
| From: | Wachter L NORTHERN STATES POWER CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20024G343 | List: |
| References | |
| NUDOCS 9102110340 | |
| Download: ML20024G345 (2) | |
Text
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l IM SIP N O R T H E ft N GTATES P O W C F1 COMFANY I
M I N N ti A l'O L 184. min N C 9OTA S t14 0 %
Ilovembor'3, 1972 l
3 3
Mr Doyce !! Grici, Regional Director I
U S Atomie 'dnergy Commission
{
Directorate of Ryntlatory Ope:ations, Region III l
799 Roor.evelt R%d Olen Ellyn, I.llinoin 00137 i
IVai *!r Grier:
)
MONTICRLLO IUCLEAR GEhTRATI110 pIAliT AEC DTKET No.30-263 VALVE VALL TIIICKIIESS VERIFICATION Tnis letter is in response to your request of June 29, 1972 informing you of l
our pinns to assure that the valvee within the reactor coolant nyatem boundary of our Monticello !!uclear Ocnerating Plant meet the minimum vall thickness re-quiremento, ao specified by the applicable codes of the original procurement specification.
f It is our intention to conduct a valve vall thickness meacurement program simult.aneoasly with our Inservice Inspection Procrcm.
This vill be performed this spring daring the fuel outage.
However, at this point it appears impractical for us to examine all of the valves in question, a total of.72 valves.
We do in-tend at thst time to exa' tine the following valves.
Main Steam Saf ety Valves h
Main Steam Relief Valvec 4
lhin Steam Isolation Valvec 8
Recirculation Daction Valves 2
Recirculation DischarCe Valves 2
Recirculation Bypass Valves 2
Recirculatiora Equalizer Valves 2
Recirculation Equalizer Bypass Valves 2
Feedwater Isolation Valves 2
In addition to those listed, we intend to examine other valves colected on the basis of their importance on maintaining coolant coverage of the reactor core and in providing a good statistical cample of-the valve type and mannfacturer.
The total number of valves vill be dependent on the available time and the impact on the scheduling of other activities that are. to be accomplished at that time.
i NOV 6 13R n
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$ r 9102110340 730122
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l PDR ADOCK 05000263
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NOR'
'ERN GTATC3 POWER CC
- ANY 11: Ibyee l! Crier 2-Ibve.:he' 3, 19'(2 W do intend in uus-the av ultranoni c techniqu+. awl procedurea tln t vere deve J op?d cnd used to ate Crailt.r t uccurement.: tit our 490 Prairie Isinnd Unito enrlier this year.
The reault: nod the extent of the progrtim v111 be evaluated to determino the future cource of netion.
Any valven round having a veill thicknenu less than thr.t required by code vill be evnlanted for odequacy in its application.
All recordo including any encJ nearinc evnluationr, and dicpocitionc of valvec will be kept at the cite rind the pertirent inf'omation vill be forwardef to you no requected in your letter.
We vould be very happy to review any details of our program with your inspectorc tst thair convenience.
Yourc very tru.ly, o hl h
f ' 4 achter, Vice President LJ Power Prodetion & Sycte:n Operation IR/na i
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