ML20056A194

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Decommissioning Survey Rept,Pu Storage Specialty Fuels Bldg Room 157. W/Two Oversize Drawings
ML20056A194
Person / Time
Site: Framatome ANP Richland
Issue date: 06/30/1990
From:
SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER
To:
Shared Package
ML20056A192 List:
References
NUDOCS 9008060106
Download: ML20056A194 (12)
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{{#Wiki_filter:s:1-e,h ~ p DECOMMISSIONING SURVEY REPORT PLUTONIUM STORAGE SPECIALTY FUELS BUILDING ROOM 157 ADVANCED NUCLEAR FUELS CORPORATION ' LICENSE NO. SNM-1227

DOCKET NO. 70-1257 1

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i. P g31 of 12 = gM N(JCL, GAR F(JELS RADioLOCtCAL SAFETY records CORPORATION RADIATION SURVEY REPORT DLOG. LOCATION - TIME DATh SvHvEY LOG NO. 0700 1530 6-4 thru 6-11-90 54 S.F. Room 157 ,o DESCRIPTION OF JOB - Survey of' vault (room 157) for unconditional release. Room was origin-ally used for storace of olutonium in sealed containers no soread'of contaminationL was noted during history of room being used for plutonium storage. ITEM OR LOC ATION ME TE R DE F L. SOURCE BETA GAMMA NEUTRON OiRECT SMEARS , 7' uEASUREuENT WO wC sire m r.a./n,. m R ni,. m,emin,. um o, ai-um., o,m 1. Floor of room 157 100 cm' O.2* 100* 20* 2. Walls of room 157 0.2* 100* 20* 3. Ceiling of room 157 0.2* 100* 120*- 4. Electrical outlets, emergency light, fire alarm bell, criti :ali ty howler temperature control un it 0.2* 100* 20* a. -Filter box, exhaust du :t. sunolv ai r duct and vacuum line 0.2* 100* 20* L 9tairs.-stairwav cable lift system. and handrails 0.2* 100* 20* 6. Maximun readinas 0.2* 76.4 16.8 $UHVE Y INSTRUMENTtSi USE O - 1.D. NUMBER (PIN OR SERI At.) RESPIR ATORY PROTECTION RE QUIRED PA M l7DO 09 'C.P. 17510.17 7ooPY C SUPPLIEO O Fi'rEa O ~o~E AIR ECM LAB CoONTE R C550,32U Y HER @@ PE RSONNE L DOSE R ATES PH ASE OF WORK N O. WHOLE BODY PEN. WHOLE BODY S AIN E XTRE ME TIES - m rc m/ ht, mecm/hr. m re m /h r. C

      • ~'S Entire room surfaces were smeared to check for smearable contamination.

Entire floor surface and 2 meters up the walls on both levels were surveyed for-fix-ed contamination. All equipment mounted on walls, handrails, auctwork and stairs were cur veved for both fixed and smearable contamination. Main floor was surveyed .for fixed contamination at each location covered by a floor tile (12"by 12"). Total of etcht locations (one spot on each wall at each level) had 100 cm' area of paint removed. Paint scrappings were surveyed and bare wall surface surveyed, found no detectable contamination during survey Paint scrappings were also sent to outside lab for analysis results were less than 2 dpm for each spot scrapped. See attached data sheets, pictures and blue prints for further infonnation.

  • indicates a less than value Survey performed by: Ed Foster, Grea York JoAnn Rosscuo and Jim Cudmore At A A. UNCQ H R t CT E D ME ASU M E ME N T M A A. COMM EC T E D DOSE H A T E a:UNAruME 3

( ) ANF-3122.137A (11/87)

u- 'L.: Page 2 of 12 i Continue - Radiation Survey Rooort No. 54 General Information About Room 157 (Plutonium Storace Vault) Room 157 was emptied of all equipment and materials. Initial. survey of the room floor was made before any cleaning was done. This initial survey is documented in Survey Report No. 47 (see Page 6). Tile and mastic was removed from the floor. A high pressure washer was used to clean upper floor grating, light fixtures and walls. Floor was then scrubbed. -No radioactive matenc's were painted over or covered. All electrical outlets, junction boxes, light fixtures, bells, alarms, etc., were surveyed. Ductwork, filter box and vacuum line were also surveyed. There are no sink or floor drains in the room. No items in the room were inaccessible to survey. No items in the room or the room itself are contaminated above release limits for Plutonium to the best of our knowledge. 'E t i 1 9 0 ' D 4%V d 44-J a.Jr( A 5 i,lW PI A. l'g*6h.4Ae3 ~.@ %sh!.(M CM 44 7.r AWWh*> % rap ++r*g N ih,^edhaw Ls,4 kM ?A ^*sh e v'*/:phes eiAwev'61#s-Jut s'#5 e tsadeutsistki WW4sep/4eA,4%TET/M

e l Page 3 of 12 : Continue Radiation Survey Report No. 54 Survey Summarv (Survey Nos.'47 and 54) Scalers were used for followino number of survevs. Number of fixed ' contamination surveys made for alpha radiation 393 ' - Number of fixed contamination surveys made for beta radiation 263 Number of smearable contamination surveys for alpha radiation 59

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Item Surveyed for Alpha Radiation (100 cm2)' Maximum Fixed 5.- Locations of Paint Scrapping (8) 10.9 dpm 8.4 dpm"' 2. Eloctrical Fixtures, etc. 100 dpm"' 16.8 dpm 3. - Filter box, ducts and vacuum lines 10.9 dpm 8.4 dpm i 4. Stairs and handralls 21.8 dpm-8.4 dpm 5. Walls 21.8 dpm 16.8 dpm 6. - Floor-76.4 dpm* 16.8 dpm 7. Ceiling 10.9 84 dpm"' i 1. Large area smear of walls 96.6 dpm/100 ft2 2. Large area smear of ceiling 8.4 dpm/100 ft2 L 3. Large area smear of floor (concrete) 58.8 dpm/100 ft2 h' -. 4. Large area smear of floor (grating) 16.8 dpm/4 ft2 h = item Surveyed for Beta Radiation (100 cm2) Maximum Fixed Maximum Smearable p 1. Floor (concreto 263 locations) 1070.7 dpm. Not Measured-i i y Indicates a less than value. 7. Floor survey done in Survey Report No. 47 was redone for all locations found to have L'" more than 8 counts /0.5 min. Resurvey was done after floor was clean with muslin cloth several times. Maximum concentration found on resurvey was 76.4 dpm/100 cm2 area. o 0 ; '..

I - Page 4 of 12 ~ Continue'- Radiation Survev Report No. 54 A. The survey instrument used to check for smearable or fixed alpha contamination was Ludlum Model 1000 Scaler with Alpha Scintillation Detector Model No. 431 with active window area of 75 cm2 The instrument had an efficiency of 24.% for.4 pi emission rate. Counts were for 1/2 minute. Background for 1/2 minute was 1. Soft cotton patches _were - . used to take smears. The patches were smaller in size than the detector area. Smear areas were at least 100 cm2. The following formulas were used to convert counts /0.5 min. to dpm/100 cm2 Smears. I 2 (Counts /0.5 min - bkgd QO.5 min) x 2 x =. dpm/100 cm 0.24 - Fixed I 100 m2 2 '(Counts /0.5 min - bkgd QO.5 min) x 2 x x = dpm/100 cm .0.24 75 cm2 B. Survey instrument used to survey for fixed contamination over large areas (floor and walls) was portable alpha survey meter using Alpha Scintillation Probe Model No.- 43 5 ' with active window area of 50 cm2 The instrument had an efficiency of 13.6% for 4 pi-- omission rate. Background for instrument was about 4 counts / minute. No detectable contamination was found above background during surveys using this instrument. 5 Formula used: I 100 m2 2 (Counts / min - Bkgd C/m) x x = dpm/100 cm 0.136 50 cm2 t

a e, g, c. - i.: 's Page 5 of 12 ' Continue - Radiation Survey Report No. 54 i CJ .The instrument used to survey for fixed beta contamination was Ludlum Model 1000 Scaler with HP-210T probe. The instrument had an efficiency of 21.25% for 4 pi emission. rate. The survey probe had a detection area of 15.5 cm2 Counts were for 1/2 minute. ' Background.for 1/2 minute was 22 counts The following formula was used to convert courds/0.5 min 16dpm/100 cm2 t y. I 100 cm2. (Counts /0.5 min - Bkgd C/0.5 ' min) x 2 x x = 2 dpm/100 cm p 0.2125 15.5 cm2 ll l l' l: i l. i d l. 'i-

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a y:. ; m .; Guide to Photooraohs Room 157 (See Following Pages). ,p , s, [fjy f l king south towards only doorway in the room. - View from northeast corner o room oo &@w l1. The second level has-a floor constructed of open grating, Staltway is movable with c .m jh o' s lift system. r View from doorway looking north into room. Room has been emptied, tile floor remove 2- . and general cleanup of room performed, ~ View of room (vault) ceiling shows concrete colling construction with steel support beams. 3. Also visible are supply air ducts and room lighting fixtures. View of south wall'on first floor shows exhaust duct in southeast corne 4. removed!- Filter box was movad so tile floor could be removed. -View of second level floor from northwest corner of rooni. Top of stairs is visible along. 5. with handrails, b View from northeast corner of room on second level shows opening required for stairway 9

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