ML20082B913

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Submits Corrected Page for Insertion Into Final Rept Re Confirmatory Survey of RB & Phase 4 Systems at Plant
ML20082B913
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 03/13/1995
From: Vitkus T
OAK RIDGE ASSOCIATED UNIVERSITIES
To: Fauver D
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
NUDOCS 9504060093
Download: ML20082B913 (2)


Text

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03~O-003 &

M ORISE March 13,1995 o- = == >~ un u n c- sc a ~c e ~~r> muc -=~

' Mr. David Fauver Division of Waste Management-NMSS U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, MD 20852

SUBJECT:

CORRECTED PAGE FOR THE FINAL REPORT-CONFIRMATORY SURVEY OF THE REACTOR BUILDING AND PHASE 4 SYSTEMS, SHOREHAM NUCLEAR POWER STATION, BROOKHAVEN, NEW YORK [ DOCKET FILE NO. 50-322]

Dear Mr. Fauver:

In Appendix B of the subject report, the surface activity correction factor for survey unit RB072X01 (Dryer / Separator Storage Pool) was inadvertently omitted from the list that appears on page B-2. Enclosed are five copies of the corrected page for insertion into the those copies of the final report submitted to you with our March 7,1995 correspondence.

Please contact me at (615) 576-5073 should you have any questions.

Sincerely, y 2 l.

Timothy J. Vitkus Environmental Project Leader Environmental Survey and Site Assessment Program TJV:daa Attachment cc: R. Uleck, NRC/NMSS/TWFN 7F27 PMDA, NRC/NMSS/TWFN 8A23 D. Tiktinsky, NRC/NMSS/TWFN 8A23 W. Beck, ORISE/ESSAP L. Pittiglio, NRC/NMSS/TWFN 7F27 E. Abelquist, ORISE/ESSAP R. Nimitz, NRC/ Region I File /273 ESSAP r5002G '

9504060093 950313 p y P. O BOX 117. OAK ROGE. IE NN!SSEE 37831 0117 Managed and eterowid by Ook R.dge Assoc.ow.d Umwe<smes icw the U S Department of tae<gy

4 (dpm/100 cm2 ) by dividing the net rate by the 4 x efficiency and correcting for the active area of the detector. The beta activity background count rates foi the GM and gas proportional detectors ranged from 15 to 37 cpm and from 100 to 207 cpm, respectively. Beta efficiency factors were 0.17 for the GM detectors and ranged from 0.21 to 0.23 for the gas proportional detectors. The effective window areas for the GM and the gas proportional detectors were 15.5 cm2 and 100 cm 2, respectively.

Surface activity measurements in all confirmatory survey units, except for RB068, RB072 x01, RWO73 x02, RWO73 x03, and SU001 that exceeded the normal background distribution were corrected for the iron-55 contribution by multiplying the dpm/100 cm2 field activity level by a factor of 1.2. For the remaining survey units, correction factors for Fe-55, H-3, and/or Ni-63 were as follows:

RB068, measured dpm/100 cm2 times 2.3  !

RWO73x02, measured dpm/100 cm2 times 35.9 RWO73 x03, measured dpm/100 cm2 times 24.2 RB072 x01 and SU001, measured dpm/100 cm2 times 2.6 1

LIPA based each of these correction factors on the relative concentrations of contaminants in the construction material of the various survey units. The instrument response level at which the detector output could be considered above background was defined as the critical level (IJ. l This level was defined for each detector / instrument combination as follows:

4 1.96 ""EI ' '*""' '" + ##' N'"" ' ""' '"

h ampl e count time Background count time L* =

(Detector Efficiency) (Detector Geometry)

Removable Activity Measurements Removable activity levels were determined using numbered filter paper disks, 47 millimeter:.

2 (mm) in diameter. Moderate pressure was applied to the smear and approximately 100 cm gr Shoreham Reme,ar BuMag and 1%w 4 - February 16. Ins B-2 I l

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