ML20024G218

Proposed Tech Specs Re Permissible Insp Interval Tolerance

ML20024G218
Person / Time
Site:	Monticello
Issue date:	09/19/1977
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20024G212	List: ML20024G211 ML20024G216 ML20024G218
References
NUDOCS 9102080351
Download: ML20024G218 (2)

Text

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{ @O 'lbble 4.6.1 - Continued l N

[ ow:ATEGORY EXAMINATION AREA EXAM METHOD INSPECTION INTERVAL EXTENT OF EXAMINATION oo 38$ D (2) Nozzle-to-vessel head Visual and ' Cumulative 100% cover- 2) Vessel Head Nozzle Welds O PJ

• velds & nozzle-to-head Volumetric age of nozzle-to-head Head. Instrumentation (2I - .1/5 yrs

, b inside radiused section veld,100% of inner Head Spray Inlet (1)' - 1/10 yrs l radius section of the g nozzle-to-head junction W j over 20% of the veld at the end of 10 yrs.

l E (1) Control rod drive Note: Not accessible

penetrations I

(2) Control Foi housing Pressure ~

Leakage test following each refueling - ~

pressure boundary velds Tests outage and hydrostatic tfest at end of 10 yre F (1) Primary Nozzles to Visual, 02mulative 100% at end 1) . Safe-end nozzles safe-end velds Surface & of 10 yr. interval (h" Becire. Outlet (2) - 1/5 yrs.

' Volumetric and longer.) Becire. Inlet (10) - 1/yr.

MainSteesiOutlet(4) - 1/2 5 yrs.

! Rtr. Feedveter Inlet (4) - 1/2 5 yrs.

j Core Sprey Inlet _(k). - 1/5 yrs.

3 (2) Vessel, Pump &

Valve safe-ends to Visual Surface, &

Cumulative 100% st end of 10 yr. interval

2) All safe-end welds in pump, valve. &

branch piping to be inspected within g

i primary pipe velds & Volumetric the 10 yr. interval i safe-ends in branch piping welds G (1) Closure studs and nuts Visunl, During 10 yr. interval

1) 100% of vessel studs & nuts vill be Surface, & visually inspected each year. 10%

Volumetric of vessel studs will be ultrasonic inspected each year.

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Table 4.6.1 IN-SERVICE INSPECTION REQUIREMENTS FOR MONTICELLO Notes:

1 Inservice inspection

1. The specified inspection interval and extent of examination are nominal values only.

may be performed during normal plant outages such as refueling shutdowns or idaintenance shutdowns occurring during the inspection interval. Except where it is stated that examinations may be deferred to the end I k of the inspection interval, et least 257. of the required examination shall have been completed by the i

expiration of one-third of the inspection interval (with credit for no more than 33-1/37. If additional examinations are completed) and at ,least 507. shall have been completed by the expiration of two-thirds of the inepection interval (with credit for no more than 66-2/37.). The remaining required examinations shall be cccipleted by the end of the inspection interval. Inspection intervals may be extended by as much' as one year to permit inspections to be concurrent with plant outages.

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E3s's ' W' S OO = %d f -l kRC DISTRIBUTION Pon PART 50 DOCKET MATERIAL l TIJ' oats oP oocuusNT -

Mr. Victor Stello 4

FROM: NSP '

09/19/77 Minneapolis, Minnesota 55401 - - - _

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L. O. Mayer 09/21/7 C Nr;*Q R IZ E D PROP INPUT PORM NUMBER oP COPIES RECElVto hETTER

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ENCLotu mE b SlOne$ I 1

License No. Dpr-22 Appl for Amend: '

tech specs proposed change concerning revising'T the examination methsd for one category and clal 1 fy the permissible inspection interval tolerance '

consistent with 10cfr 50, Section 50.55a(g) and j Section XI of the ASME Code (1974 Edition throus I Summer 1975 Addenda) . . .Notorized 09/19/77.....

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I MONTICELLO j jcm 09/21/77

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