ML20064F980

Proposed Tech Specs Bases Page B 3/4 7-7,correcting Administrative Error as Issued by Amend 159

ML20064F980
Person / Time
Site:	North Anna
Issue date:	03/09/1994
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20064F973	List: ML20064F968 ML20064F980
References
NUDOCS 9403150519
Download: ML20064F980 (2)

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1 Attachment l Corrected Technical Specifications Bases Page .

1 North Anna Power Station 4

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PLANT SYSTEMS BASES 3/4.7.11 SEAL FD SOURCE CCNTNAINATION The limitations on scalod source removable contamination ensure that the tota! body or -

Individual organ irradiation does not exceed allowable limits in the event of ingestion or Inhalation of the source matorial. The limitations on removable contamination for sources requiring leak testing, including alpha emitters, is based on 10 CFR 70.39(c) limits for plutonium. Scaled sources are classified into three groups according to their use, with l surveillanco requiroments commensurato with the probability of damage to a source in that group. Those sourcos which are frequently handled are required to be tested more often than those which are not. Sealed sources which are continuously enclosed within a shielded mechanism (l.o., scaled sources within radiation monitoring or boron measuring devices) are considered to be stored and need not be tested unless they are removed from the shielded mechanism.

'1 3/4.7.12 SETTLEMENT OF CLASS 1 STRUCTURES In order to assure that settlement does not excoed predicted and allowable settlement values, a program has boon established to conduct a survey of a specified number of points at the site on a semi annual basis. The first survey was conducted in May 1976 to establish baseline elevations for most of the points. Where applicable, the base-line elevations of points establishod subsequent to the May 1976 survey have been adjusted to the May 1976 survey by an ovaluation of the settlement records of settlemont points on the same structure or on nearby structures. Baselino elevations for some points were established on dates other than May 1976 as indicated in Table 3.7-5. Additional surveys will be performed semi-annually. The dolormination of the elevation of the points located in the immediate vicinity of the Service Walor Roservoir shall be by precise levoling with second order Class il accuracy as defined by the U.S. Department of Commerce. National Oceanic and Atmosoheric Administration. National Ocean Survey.1974.

The change in olovation of points 113 and 117 in the main plant area shall be dotormined by direct measurement from a single instrument set-up. A difference in survey rod readings from the singlo set-up will ostablish an initial difference in olevation between the two points.

Subsequent reading will determine if there is a change in the initial difference, indicating additional differential movement. Because the differential movement between points 113 and 117 have previously approached the allowable limit, the direct reading method will provido the most accurato data and will minimizo random survey error associated with survey loops. The direct reading method will involvo equipment and will produce results that are comparable to second-order Class ll accuracy.

NORTH ANNA - UNIT 2 B 3/4 7-7 Amendment NoA47, l

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