ML20009B014

Proposed Revised Tech Spec Page 15.4.2-1c & Table 15.4.2-1, Permitting Repair of Degraded or Defective Steam Generator Tubes by Sleeving

ML20009B014
Person / Time
Site:	Point Beach
Issue date:	07/02/1981
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20009B011	List: ML20009B010 ML20009B014
References
NUDOCS 8107140659
Download: ML20009B014 (2)

Text

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Defect is an imperfection of such severity that it exceeds the minimum acceptable tube wall thickness of 50%. A tube contain-ing a defect is defective.

Plugging Limit is the imperfection depth beyond which the tube must be removed from service or repaired, because the tube may become defective prior to the next scheduled inspection. The plugging limit is 40% of the nominal tube wall thickness.

6.

Corrective Measures All tubes that leak or have degradation exceeding the plugging limit shall be plugged or repaired by a process such es sleeving prior to return to power from a refueling or inservice inspection condition.

4 7.

Reports (a) After each inservice examination, the number of tubes plugged i

or repaired in each steam generator shall be reported to the I

Commission as soon as practicable.

(b)

The complete results of the steam generator tube inservice inspection shall be included in the Annual Results and Data Report for the period in which the insoection was completed. In addi-tion, all results in Category ( 3 of Table 15.4.2-1 shall be reported to the Commission prict to resumption of plant operatien.

(c)

Reports shall include:

l 1.

Number and extent of tubes inspected.

i 2.

Location and percent of all thickness penetration for each indication.

3.

Identification of tubes plugged or repaired.

(d)

Reports required by Table 15.4.2 Steam Generator Tube Inspection shall provide the information required by Specifi-cation 15.4.2.C.2 and a description of investigations conducted to determine cause of the tube degradation and corrective measures taken to prevent recurrence.

i B.

In-Service Inspection of Reactor Coolant System Components Other Than f

Steam Generator Tubes l

The in-service inspection program is generally based on the recommendations of ASME Boiler and Pressure Vessel Code,Section XI, Summer 1971 Addenda as practical for a plant whose design and construction preceded issuance of the recommendations. The commitments herein are made assuming that the necessary inspection l

l l

r 15.4.2-1c 8107140659 810702

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TABLE 15.4.2-1 STEMI GENERATOR TUBE IMSPECTION PER UNIT POINT BEACH UNITS 1 & 2

+

IST SAMPLE EXAMINATION 2ND SAMPLE EXAMINATION 3RD SAMPLE EXAMIt1ATION t

Sample Size Result Action Required Result Action Pequired tesult Action Required A minimum of C-1 Acceptable for N/A N/A N/A N/A S tubes Continued Service i

per Steam Generato r C-2 Plug or repair tubes C-1 Acceptable for N/A N/A (S.G.)

exceeding the plugging Continued Service limit and proceed with

~ ~ - -

exceedingthepluggingl 2nd sample examination C-2 Plug or repair tubes C-1 Acceptat:le for S=3(N/n)%

of 2S tubes in same Centinued Service steam generator limit arxl proceed with 3rd sample examination C-2 Plug or repair tubes l

Where:

of 45 tubes in same exr eding plug limit.

steam generator Acceptable for N is the Continued Service number of s tea.n C-3 Perform action re-generators quired under C-3 of 1st in the plant = 2 sample examination C-3 Perform action re-quir ed under C-3 of 1st N/A N/A n is the sample examination number of steam C-3 Inspect esser.tially all C-1 in Acceptable for N/A N/A generators tubes in this S.G., plug other Continued Service l

inspected or repair tubes exceed-l S.G.

during an ing the plugging limit examination and proceed with 2rxl C-2 in Perform action required N/A N/A samplo examination of other under C-2 of 2nd sample 2S tubes in the other S.G.

examination above steam generator.

Report results to NRC C-3 in Inspect essentially all N/A N/A within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in other tubes in S.G.

& plug or accordance with S.G.

repair tubes exceeding the l Technical Specification plugging limit.

Report to 15.6.5.2.A.3 NRC within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in ac-cordance with Technical Specification 15.6.5.2.A.3