ML20195D803

Discusses Results of Confirmatory Survey Performed on 881006 & 07 in Bldgs 250 & 251

ML20195D803
Person / Time
Site:	07000036
Issue date:	10/26/1988
From:	Mallett B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Rouse L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20195D724	List: ML20195D721 ML20195D748 ML20195D782 ML20195D788 ML20195D803
References
24894, NUDOCS 8811070139
Download: ML20195D803 (2)

Text

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,0GT 27 S88 12:32 NRC REGZON 3B P01 j 4

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NUCt. san REGULATORY COMMissl0N

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OCT 2 61988 HEMORAh0VM FOR:

Lelanc C. Rouse, Chief, Fuel Cycle Safety Branch, NMSS FROM: l Bruce S. Mallett, Chief, Nuclear Materials Safety Branch, Region III l l

SUBJECT:

CONFIRMATORY SUPVEY .',T COMBUSTION ENGINEERING (HEMATITE)

The purpose of this memorandum is to dis:uss the resul'5 of the confirmatory survey performed oy G. H. France, !!!, F.el Facility Ir.spector, on October 6 and 7, 1988, in Buildings 250 and 251 at combustion Engineering's fuel fabrit.ation facility in Hematite, Missou*i. Donald J. Sreniawski, Chief.

Nuclear Material Safety Section 2, accompanied Mr. France du-ing the onsite survey -

The c^

4 3atory teasurements, coupled with a review of the licensee's survey and history of facility operations, in'18:ates that the licen3ee conducted cleanup efforts that were effective in 7cing radioactive contamination levels to below NRC guidelines. On this batis, we concur with the licensee's data and request to release Buildings 250 and 251 for "unrestricted use."

The inspector determined that surface gatal uposure rates for direct readings in the two buildings ranged from 9-65 pR/hr. Surface gamma expQsure rates for the asphalt /concrate walkway ranged fro.n 10-70 pR/hr. General background upumure rates ra1ged fropt 6 to 10 pR/hr for the Hematite site. Smears were counted to determine gross alpha activity. The maximum smearable level was 29 dpm/100cm2 Smears fron locations of elevated direct beta gamma measurements indicated only a small amount of transferable contamination. The highest level of fixed gross alpha contariination was determined to be 1430 dpm/100cm2 Unless NRC ob'jicts, the licensee plans to demolish Buildings 250 and 251 and construct. a lar'ger f acility that would place more services under one roof. To support these modifications, the licensee performed core hole drilling in the

. oil beneath tne asphalt and concrete walkways outside the buildings.

Preliminary, unconfirmed results indicate that total alphe contamination in th1 soil samples ranged fron 1 to .'42 pCi/g. Ine sampics were selected from 9 core hole drillings consisting of 5 sanples per core hole collected at one foot intervals. $amples fron 6 of the core hcles were submitted to NRC Region III for confirmatory reasurements. The licerisee's data for soil measurements in the areas selected for new foot.ings to ccnstruct the new facility showed readings of 3 to 21 pC1/g. On this basis , the licensee requested permission to form footingt and conmence constructicin p rior to the onset of cold weather.

This would enable the l'censee to place tne area under roof while demolishing Buildings 250 and 251.

3311070139 esto33 hDR ADOCK 07000036 PDC

OCT 27 '88 12 32 t4RC REGIGN 38 P02 i

Leland C. Rouse 2 OCT 2 6 Mit Based on this preliminary data, Region III concurs with the licensee's request to com.t.ence construction with the understanding that additional survvys and confirmatory measurements may be needed to fully characterize the radiation levels of soil located beneath the existing asphalt / concrete walkways, if you have any questions about these comnents, please call 0. J. Sreniawski (FT5 388-5611) or G. M. France, III (FTS 388-5786) of my staff.

Bru:e S. Mallett, Chief Nuclear Materials $sfety Branch ,

. cc: License File C. E. Ncrelius, RIII ,

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