ML20205H217

Supplemental Safety Evaluation Re Util 820820 & 860113 Requests for Relief from Inservice Insp Requirements. Volumetric Exam Acceptable Method for Detecting O.D. Initiated Flaws.Relief from Surface Exams Should Be Granted

ML20205H217
Person / Time
Site:	Point Beach
Issue date:	09/10/1984
From:	NRC
To:
Shared Package
ML20204G816	List: ML20204G813 ML20205H217
References
TAC-55500, TAC-55501, NUDOCS 8810280415
Download: ML20205H217 (2)

Text

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,8 g NUCLEAR REGULATORY COMMISSION O j WASHINGTON, D. C. 20555

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Enclosure 1 SUPPLEMENTAL SAFETY EVALUATION ON REQUEST FOR RELIEF FROM INSERVICE INSPECTION REQUIREMENTS WISCONSIN ELECTRIC POWER COMPANY POINT BEACH NUCLEAR PLANT UNITS 1 & 2 DOCKET NOS. 50-266 & 50-301 .

I. Background Infonnation  !

By letters dated August 20, 1982 and January 13, 1983, Wisconsin Electric Power Company, the licensee, submitted relief requests for the second 10-year inservice inspection plan for Point Beach Nuclear Plant Units 1&2.

The staff issued its evaluation of those requests on March 29, 1984.  !

The evalaation of one of the licensee's requested reliefs for Point Beach Unit I was inadvertently omitted from the staff's March 29, 1984 Safety ,

Evaluation (SE). This was brought to our attention in the licensee's  !

July 6, 1984 letter requestin'g additional relief requests. The purpose of this Supplemental Safety Evaluation is to evaluate that relief 'omitted from the staff's March 29, 1984 SE.

This report provides an evaluation of the requett, supporting information, and alternative examination proposed in lieu of the requirements of the 1977 Edition through Sumer 1979 Addenda of Section XI as modified by  :

paragraph (b) of 10 CFR 50.55a. The Inservice Inspection Program and relief granted remain in effect for the facility until December 22, 1990 for Unit i unless revised or modified prior to that date.

RECUEST FOR _ RELIEF RR-1-9: Relief is requested from performing the required surface examination of the safety injection reducer-to-safe end welds l RC-4-SI-1001-32 and RC-4-SI-1002-18 (Item No. 89.11, Categnry B-J).

CODE REQUIREMENT A surface and volumetric examination of 25% of the circumferential joints each inspection interval (10 years).

BASIS FOR REQUESTING RELIEF A surface examination is not possible due to the inaccessibility of this area. These weids are located between the vessel and biological shield wall.

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a2-ALTERNATIVE EXAMINATION A volumetric examination of each reducer-to-safe end weld will be performed every 10 years when the associated nozzle-to-safe end weld is performed. This examination is performed from the inside diameter of the safe end using mechanized equipment.

STAFF EVALUATION The location of the reducer-to-safe end welds makes the required surface examination impractical to performa Volumetric examination of the welds is performed from the inside surface of the pi3es. The staff finds the volumetric examination to be an ecceptable met 1od for detecting 0.0. initi-ated flaws and concludes that relief from the surface examination require-ment may be granted as requested.

CONCLUSION Based on the review sunnarized, the staff concludes that the relief granted from the examination requirements and the alternate methods imposed through this dt:ument give reasonable assurance of the com-ponent pressure boundary and support structural integrity, that granting relief where the Code requirements.are impractical is authorized by law and will not endanger life or property, or the connon defense and security, and is otherwise in the public interest considering the bur-den that could result if they were imposed on the facility.

The Commission has preparti a "Notice of Environmental Assessme'nt and Finding of No Significant impact" in connection with this granting of relief from the ASME Code. The notice was Register on September 5, 1984 (49 FR 35061). published in the Federal Date: September 10, 1984 Principal Contributor:

l T. Colburn I

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