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{{#Wiki_filter:SONGS HP INDIVIDUAL TASK ASSIGNMENT (!TA} 4 } De s C r i be wha t C On s t it ut e s C Om p1 e t i On_--';.'-'i/~,/i-i'-',,,,?~,,j"",-'-~.' - ~~....~;-*__r~*~...'-',i,-'-:..'--,1._,..,_.~,~)\-*~--~;~,*-**-~r'--,:-~**"=':~'--,R"-'i'e--/---=<l."-_f_-""'~~,-;_r""C-t..._*____,,,'--..Q"-. I B. ASSIGNOR(S): Compliance with this Section is indicated by your signature or initials below.
- 1) All necessary documents are to be referenced and/or readily available and/or attached.
- 2) Prime assignor and assignete discuss th..!.:_JIA(a~d agree on Prime,.*Q\J~.. Da~e, assignor en~;rs: \~}
PRIME DUE DATE* ofs2-c94--3_Ass igned to I ~7,(201,/' By lk:1.:,J(c_) On/-*_-**< C::,*rtt,**
- 3) Subsequent assignor and as ignee discuss and agree on Sub Due Date, assignor enters:
SUB DUE DATE* of Assigned to By On _ _ _ _ __
- 4) Assignor(s) gives original !TA to assignee and forwards a copy ta TAC Coordinator.
*Prime Due Dates should be at least 5 caleridar days beyond the date when task first assigned and Sub Due Dates must not be later than Prime Due Dates.
~* C. DUE DATE EXTENTION REQUEST: This Section is not a substitute for the Prime Due Date in Section B which must be agreed to between assignor/assignee prior to establishment. Required exten-sions, initiated by assignee, are to be requested as far in advance of the pending due date(s} as possible whenever completion date problem; are identified. 1 ) New SUB DUE DA TE of ________ ______Re quested By ________---c-_On_.-- - - - -
- 2) New PRIME DUE DATE of _ _ _ _ _ _ _ _ _ _ _ _ Requested By _ _ _ _ _ _ _ _ _On _ _ _ _ __ ~*
- 3) Reason why due date cannot be met ________ ________ ________ _____
- 4) New SUB DUE DATE of _ _ _ _ _ _ _ _ _ _ _ _ _Approved By ________ __on _ _ _ _ __
- 5) New PRIME DUTE DATE of Approved By On _ _ _ __
- 6) Copy of ITA forwarded to TAC Coordinator By ________ ________ _______~
D. TASK COMPLETION: To be completed by assignee and forwarded to originator.
- 1) Statement of completed action &,. .l?LE.Teb :n-tE i2.EQuEs . ~
*. LiE:,...AO 2} Date completed
- 3) Is a co PY of completio,n (ACTION IS NOT COMPLETE WITHOUT THIS)
- 4) Signature of Assignee
- 5) Originator is to forward supporting documentation to TAC Coordinator.
To TACC on date, By ________ ________ _____ Distribution: White - Originator Canary & Pink - Assignee Goldenrod - TAC Coordinatof
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MEMORANDUM FOR FILE February i7, 1984
SUBJECT:
11 01 d Highway 101 Land Fil 111
REFERENCES:
- 1) Radiation Survey Report, C. Holle to 8. Graham, dated April 17, 1981
- 2) Letter, R. Melgard (EAL Corporation) to B. Graham (SONGS Chemistry), dated April 3, 1981;
Subject:
-- 11 Soil Samp 1e Results" On January 12, 1984, a telephone conversation occurred between Mr. B. Graham, SONGS Environmental Monitoring, and Mr. G. Yuhas, USNRC-Region V. Mr. Yuhas inquire d about the results of a Station investi gation regarding the possib le presence of plant-g enerate d radioa ctivity in the "Old Highway 101 Land Fill." He recommended that Station review the results of radiati on surveys and isotop ic analyses of soil samples obtained at the land fill to determine the need for a 10 CFR 20.302 submit tal.
- The purpose of this Memorandum is to document Station 's evaluation of all availab le radiolo gical data relatin g to the land fill site and to close the issue.
BACKGROUND: During the March 1980 - June 1981 Unit 1 outage, TMI retrof it project s require d the removal of soil from radiolo gically contro lled areas. Isotop ic analyse s of samples of the excavated materia l revealed the presence of low level radioac tive contamination. As a result of those finding s, Station investi gated disposal methods for previous excavations at SONGS Unit 1 .to determine whether or not contaminated soil had been inadve rtently release d. It was determined that the only signifi cant excavation which had previou been experienced at Unit 1 was performed during the October 1976 - March sly 1977 outage when a signifi cant amount of substra te was removed to allow constru ction of the Diesel Generator and BiologicaJ Shield structu res. Through interviews with individ uals who worked on those projec ts, the of the disposa l site for the excavated materia l was also determined .. locatio n
MEMORANDUM FOR FILE February 17, 1984 SURVEYS AND ANALYSES: Reference 1 descri bes an extens ive radiat ion survey conducted of the "land fill" area in March 1981. Exposure rates between 5 11R/hr and 15 11R/hr were measured by Ludlum Model 19 Micro-R-Meters. Those readin were well within the normal range for natura l background radiat ion. gs surveyor concluded that there was no evidence of radioa ctive contam The That conclusion is substa ntiate d by the result s of isotop ic analysesination . performed by EAL Corpo ration , a contra ct labora tory, on three soil samples obtain the land fill. Reference 2 report s those result s, and indica tes only ed from natura lly occurr ing radon and thoron daughter produ cts. No radioa ctive activa tion or fissio n products were identi fied. DISCUSSION: Though all exposure rate measurements were within the range of natura background radiat ion, the radiat ion survey map, contai ned in Referencel seemed to indica te a locali zed area with slight ly elevat ed readings 1, (14-15 µR/hr) . To evalua te that anomaly, the land fill site was visite d. The "old land fill 11 is locate d approximately 1 1/2 miles south of the Edison Traini ng and Education Center. The land fill is access ible by new fronta ge road that parall els Inters tate 5 on its east side. The site the of two ravine s which run from the fronta ge road, join near Inters tate consi sts term.inate in a culver t which contin ues under the Inters tate. The area 5, and heavil y overgrown with foilag e, although dirt mounds and broken concre is visibl e. te are Exposure rates of 5 11R/hr to 10 11R/hr were observed in and around the ravine using an Eberline PRM-7 Micro-R-Meter. The readin gs were not by placin g the meter in contac t with the materi al that had obviously increa sed off-lo aded there. Special attent ion was paid to the area which showedbeen highe st readin gs during the refere nced survey. The points which showed the elevat ed readin gs during the 1981 *survey were locate d and exposu measurements were made. The exposure rate observed on the shouldreer rate of the road was 8 11R/hr to 10 11R/hr. The exposure rate measured on the surfac of the concre te road was 14 µR/hr to 16 11R/hr. Simila r measurements e obtain ed along the road in the vicini ty of the ravine with identi cal were An analogous set of measurements made at a locati on approximately 1/4 result s. north of the land fill demonstrated comparable result s. mile It is obvious that the elevat ed exposure rates are the result of natura radioa ctivit y in the concre te of the road. l
MEMORANDUM FOR FILE February 17, 1984 CONCLUSION: ) Based on the results of GeLi analyses performed by the contrac t environmental labora tory, the extensive radiati on survey performed in 1981, and the verific ation of the results of that survey, the soil disposed of in therecent Highway 101 Land Fi 11 11 did not contain 1i censed materi al. A 10 CFR 20. 30201d 11 submit tal is not require d. 1-~~
*- TERRY COOPER Health Physics Engineer TC:20271:jms cc: P. J. Knapp R. V. Warnock G. Gibson B. Graham COM files
) January 12, 1984 P. KNAPP
SUBJECT:
Radiolo gical Environm ental Survey of Old Hwy 101 Landfil l Attached for your informa tion and review are:
- 1) Telephon e note from Jan. 12,-1984 convers ation between B. Graham (SCE-SONGS) and Gregory Yuhas (NRC).
- 2) EAL Corpora tion results of laborato ry analyses of soil samples collecte d from the subject landfil l.
- 3) Report from C. Holle to B. Graham concerni ng Environm ental Survey of subject landfil l.
Please let me know if you need addition al help or informa tion. )
~~
B. GRAHAM BDG:li Attachm ents cc: L, D. Brevig R. Warnock P. Croy D. Duran R. Rosenblum Chemist ry File CDM )
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CORP ORAT ION 2030 Wright Avenue Richmon d, Californ ia 94804 (415) 235-2633 J (TWX) 910-382-8132 3 April 1981 Ref: EAL 2301 Mr. Barry Graham San Onofre Nuclea r Gener ating Statio n P.O. Box 128 San Cleme nte, CA 92672
Dear Mr. Graham:
The result s of the soil sample s we receiv ed on March 2, 1981, have been comple ted and are shown on Attach ment 1. ) We appre ciate this oppor tunity to be of servic e. Very truly yours, Marvin P. Hunt Senior Enviro nment al Chemist {3 . ~,~ I Rodney ~lgar d, ~~:::i Nuclea r Scienc e Depart ment MPH/RM/cm Attach ment 1 cc: D. F, Filmer
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r. ATTACHHENT 1 SOIL RESULTS
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Collecti on
. Site Ge (Li) Scan nCi/kg +/- 2 0-Radioch emical nCi/kg +/- 2 CT and Date (dry wt. basis) Isotope (dry wt. basis)
Jap Mesa Dumpsite 0.51 +/- 0.03 60Co 1/21/81 0.63 +/- 0.03 137Cs 0.70 +/- 0.04 226Ra decay chain (1) 0.36 +/- 0.07 232Th decay chain (2) gosr 0.09 +/- 0.02 SONGS I 0.07 +/- 0.01 60Co Security Bldg. 0.04 +/- 0.01 137Cs 1/21/81 0.47 +/- 0.02. - 226Ra decay . chain (1) 232Th decay chain (2) -*-----*** 0.28 +/- 0.04 gosr 0.02 +/- 0.01 E. side of 0.05 +/- 0.02 60Co Sphere Near 0.12 +/- 0.02 137Cs Door 16 1.05 +/- 0.05 226Ra decay chain (1) 2/19/81 0.33 +/- 0.06 232Th decay chain (2) gosr 0 +/- 0.01 Location 0 +/- 0.01 60Co
) No. 33 Old 0 +/- 0.01 137Cs Hwy. 101 0.33 +/- 0.03 226Ra decay chain (1) 2/19/81 0.29 +/- 0.05 232Th decay chain (2) gosr 0 +/- 0.01 Location 0 +/- 0.01 60Co No .. 28 Old 0 +/- 0.01 137Cs Hwy. 101 o. 29. +/- 0 .03 226Ra decay chain (1) 2/19/81 0.26 +/- 0.05 232Th decay chain (2) 90Sr 0.04 +/- 0.01 Location 0 +/- 0.01 soco No. 24 Old 0 +/- 0.01 137Cs Hwy 101 0.42 +/- 0.03 226Ra decay chain (1) 2/19/81 0.35 +/- 0.06 232Th decay chain (2) 90Sr 0.02 +/- 0.01 (1) The n;:itural ly occurrin g 22 6Ra decny chain r~por.ted is cnlcul.it 0d 011 the 21LJBi photopea k at 0.609 MeV. Other pho_topeaks detected in this chain are 226Ra, 214Pb, 210Bi and 210Tl, (2) The naturall y occurrin g 23 2Th decay chain reported is calculo ted on the 22BAc photopea k at 0.910 MeV. Other photopea ks detect~d in this chain are 22srh, 212pb, 212Bi and 2osT1.
SAN ONOFRE NUCLEAR GENERATING STATION MEMORANDA FOR FILE APRIL 17, 1981 TO: :£3, GRAHAM FROM: .C. HOLLE
SUBJECT:
Environmental Survey of 1976-1977 Land Fill Site approximately 2.5 miles South East East of Jap Mesa PURPOSE: During the. construction of Unit One Sphere Containment in 1"976 and 1977 a large amount of soil**was*removed and disposed of at a site approximately 2.5 miles South East East of Jap Mesa. During the disposal operation there was evidentially no reason to be concerned with the possibility of this resultant land fill being contaminated with radioactive materials resultant from the past operation of Unit One. With in the recent past a careful study has been made of the events surrounding the exavation and subsequent disposal of soil associated with Unit One Sphere. The results of this study pointed for a need to survey the land fill site to asertain once and for all the degree of radioactive contamination, if any, present at the site. On February 4, 1981 through February 7, 1981 a radiation survey was conducted by Moore, McClung, Southerland, Naylor and Antonelli. Although this represented an extensive survey of the area a number of questions were raised during the analysis of the survey results. These questions were roostly based on two criteria. First, there was extreme difficulty in matching the data gleened from the two different Ludlum Model 19 Micro-Roentegen Meters used for the survey and the low range calibration of these instruments were also in question. Secondly, data showed a wide variance in reading obtained in adjacent locations. For example data from a survey of the drainage tunnel under Interstate 5 showed a variance from 10 to 150 micro-roentegen/hour. It was also noted that the survey -did not include information from areas of the ravines were the angle of incline approached and many times exceeded 30 degrees. Because of the foregoing reasons on March 12, 1981 the decision was made to conduct an exhaustive and hopefully reproduceable survey again to asertain once and for all whether or not the activities associated-with the 1976-1977 Unit One Sphere construction had led to any radioactive contamination of the land fill. DISCUSSION: During initial planning for the survey every attempt was made to devise procedures that would standardize each survey measurement and make it possible to locate at a later date each survey point for later resurvey or soil sampling. After careful research it was decided that all survey measure-ments would be taken at a distance of one meter from the surface of the soil. This hopefully would allow a comparison of results with other environmental surveys performed recently throughout the Health Physics profession.
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f SAN ONOFRE NUCLEAR GENERATING STATION MEMORANDA FOR FILE 17. APRIL }<1, 1981 PAGE 2 DISCUSSION (Continued): To elimi nate any unexplainable data techniques were devised to both enhance reproducability and varience two other and/or any inter feren ce caused by buildup of natur ally occur detec t source posit ion activ ity.r esul tant from atmospheric inversion at the surve ing airbo rne radio - Firs t, caref ul study of the manufacturers liter ature yyieldpoin ts. u~derstanding of the Ludlum Model 19 Micro-Roentegen Mete ed a detai led
- has a one inch by one inch Sodium Iodine (Thallium activ ated) r. This instrument at the front and bottom of the instrument. Hence all surve cryst al located
. taken with the face of the instrument dial' and thusl y-the y meas urem ents were cryst al parre lle1 to the soil surfa ce being measured. This cente rline of the*-
ative ly easy to perform on gentl e incli nes and somewhat more techn ique was rel-dealing with incli nes which in some cases excee 30 degrees. diffi cult when the manufacturers liter atur e gave helpful infondnatio n about Further study of actis tics of the Ludlum Model 19 Micro-Roentegen Meter. As the response char-were theoriz-ed to be readable on the. lowest scale , 0 to 25 all meas urements all data was taken with the instrument in the Slow Response Micro -Roen tegen/Hour, mode. This technique resul ted in a period of response as per or Slow Reac tion manufacturers liter atur e of approximately 11 seconds for each above ment ioned Actual field experience indic ated reproduceable response measurement. 5 seconds to as long as 30 seconds. For this reason, at each time of approximately instrument was held in the above discussed geometry for a surve y poin t the seconds to insur e that the instrument had indeed given a stabl perio d of 15 to 30 able measurement. e and reproduc-Second, extensive past field experience with the measuremen radia tion level s had indic ated as much as a 30 perce t of low level nt* varia tion observed when the individual holding the instrument positioned in readings so as his body was between the source of radia tion and the the instrument to having an unobstructed field of measurement in relat ion detec tor as opposed to the Detailed study of professional papers submitted throughout known source. Physics profession indic ated that the potential for inter feren the Health tant from the accumulation of natu rally occuring airborne ce in data resul - atmospheric inver sions . In worst cases measurements could radio activ ity during much as 85%. It was noted that these accumulations of airbo be cause d to vary as when encountered during atmospheric inversion almost exclu rne radio activ ity clou d-lik e conc entra tions in which a given reading with in sivel y repre sente d at least 15% with a change in air movement, survey instrument the cloud varie d time. This char acter istic of natur al airborne radio activ ity posi tion, and uceable in all insta nces except those dealing with a parti appeared reprod-such as the drainage tunnel under Inter state Highway 5 where ally enclosed areas much more uniform due to lack of air movement wi*thin cente measurements were tunn el. r portions of the 1
- Due to the foregoing cons idera tions at each measurements were taken. Using a relat ively inexpsurve y point four sepe rate ensive compass with no mag-netic corre ction s applied measurements were taken at each instrument and the individual holding the instrument facin point with the East, South, and West compass direc tions in that orde r. g in the North, then
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SAN.ONOFRE NUCLEAR GENERATING STATION MEMORANDA FOR FILE ..... APRIL 17, 1981
'. P.AGE 3 DISCUSSION {Continued): Comparison of the four meas made it possible to distingui*sh as to whe urements at each point ther point was indeed valid and reproduceable. Measurem the data for each part icul ar with othe r measurenents at the same point would be ents when late r compared another by less than 15% unless some othe r influence expe cted to vary one from*:
to a point source or build up of natu rally occuring such as clos e proximety
- during atmospheric inversjons. Actual fiel d experienc airb orne radi oact ivity survey locations out of the over 130 locations surv e show ed that only 10 of grea ter than 15%. Variance was calc ulat ed by sele eyed show ed a*va rian ce lowest of the four readings taken at a given poin ctin g the high est and these two values was then divided by the t. The difference* between lowe st read could be converted to percent variance. Later resu ing giving a decimal that showed that earl ier reading were defi nite ly being rvey of these 10 locations of natu rally occuring airborne radi oact ivity durin effe cted by the buil d up For example one survey loca tion when firs t measuredg atmospheric inve rsio n.
11.5 and 15 micro-Roentegen per hour. Init ital exam showed readings between showed a varience of over 30% between the four read ination of this data After comparison with othe r -surrounding survey poinings taken at that location. this varience was not being caused by a point sour ts it appeared evident that
*, it became'readilly clea r when the survey point was ce. As fiel d experience grew atmosph~ric inversion. For example on one Sunday morn under the influence of an of 19 mi cro-Roentegen per hour was observed where ing a general background of 8 to 10 micro-Roentegen per hour and when the earl er data showed . readings of grea ter than 15% were observed were resurveyed loca tion s in which variences was grea ter than 15% lower than that init iall y obsethe highest reading observed points was well wit hin ! 15%. rved and agreement between As the desired goal was to obtain land fill areas and the nearby areas to enou gh information from survey of both dist ingu ish a~y possible diff eren ces between the two several techniques were developed area to be surveyed in was deemed that the to this end. Due to the large init ial imately 10 meters apar t. Later examination of the survey points would be approx-more deta iled area survey was requ ired , but hope data would show whether a proved this degree of deta il was both expediate and fully~ and as fiel d experience the desired goal. It should be noted that out of sub stiti ve enough to reach the meters surveyed only approximately 900 square mete approximately 3000 square as being of land fill orig in. rs showed dist inct evidence In order that the data presented would be an accu trends in radi atio n leve ls observed in one area rate reproduction of the techniques used in taking the measurements became vers us another the sequence and most ruggedness of the terra i'n line of site approxirnation important. Due to the angles became impossible. To solve this problem a s of perpendicual or par.alle1 although not corrected for magnetic erro r, made it compasss was purchased which.
points to bela yed out in a NORTH-SOUTH, EAST-r/EST poss,ble for adja cent survey on a road map where the upper left corner is Nort GRID somewhat like that observed A-1. h-West and has the designation
r' SAN ONOFRE :NUCLEAR GENERATING STATION '""l\
} MEMORANDA FOR FILE APRIL 17, 1981
~ PAGE 4 DISCUSSION (Con tinue d): The sequ ence in which the surve y data was take n was desig ned to most effe ctiv ely plac e surv ey loca tion s appr oxim ately 10 mete rs apar t with out the time consulllling~* use of surv eyor Nort h-We st Corn er of the surve y area a sequ ence s equip ment , Star ting in the of surve y poin ts was take n in an arc star ting at 90 degr ees and proc eedin g to 180 degr ees at which time a retu rn to 90 degr ees was affe cted , 'l'his proc ess inte rest was s~e yed at the pres cribe d 10 mete was repe ated unti l the area of r inte rval s,
**-*-- *It shou ld be note d that at each surv ey poin t*top ogra phic al data was gathe red.
for purp oses of both surv ey map making, and late r The map obta ined can only be cons idere d an accu anal ysis of surv ey resu lts, rate depi ction of the area if it is reali zed the measured 10 mete r incre ment s the area as if all the depr essio ns eg, ravin es caus e the illus trati on to refle ct and gull ies, were raise d to the same leve l as the uppe r most elev ation s of the area , Figu re 1A and 1B show the measurement data reco rded for each surv ey poin t, As state d all read ings are in micr o-Ro enteg en/H hour Scal e of Ludlum .Model 19 Micr o-Ro enteg en our read ing the 0-25 micr o-Ro enteg en/ reco rded are the high est obse rved at that poin Mete r Seri al Number 1290 6. Readings t from the four read ings take n, From prev ious disc ussio n it shou ld be note d agai n fina l surv ey resu lts refle cted . at leas t t 15% agree ment betw een meas urem ents, Figu re 2 shows the soil clas sific atio n give n to reas earc hing rece nt stud ies made in the field each surv ey poin t, From of Envi ronm ental Heal th Fhys ics it was learn ed that reten tion of radi oact ive mate rials in soil was inve rsl)'. ;pro-port iona l to soil part icle size . This data was area s which showed evid ence of bein g actu al land also help ful in defi nini ng the to be almo st enti rely beac h sand with a rela tive fill . Land fill soil was known ly low soil part icle size and thus ly in most case s a char acte risti cally high er natu ral back groun d read ing pote ntia l, Fina lly, Figu re J depi cts the area as to the incli incl ine enco unter ed at each surve y poin t, Init ne of the soil surf ace ially this dat was colle cted . to yiel d a poss ible unde rstan ding of the pote ntial tran spor t mechanism afan y radio - activ e mate rial found at the surve y site . This infor mati on was also most help - ful in making the cont ours sho,m as accu rate as poss ible in ligh t of the obvi ously rude dire ctio n and measurement tech niqu es used to sele ct the surve y poin ts. It shou ld be noted in the summation of this ifica tion or elev ation data is shown for the surv disc ussio n that no soil clas s-ey data colle cted in the drain - age tunn el unde r Inte rstat e Highway 5 as this was a conc rete tunn el with a slope of less than 15%.
SAN ONOFRE NUCIEAR GENERATING STATION
--c:J .H£MORAiHlA FOR FILE APRIL 17, 1981 PAGE 5
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CONCLUSION AflD RECOHHEN'DATIONS: After carefu lly examining the resul ts presen ted on the attach ed Figure s 1 throug h J it s.!;..r;.~ld t~ eviden t that no eviden ce what so ever was obtain ed tht would show any of the landf conclu sive ill area was contam inated by radioa ctive mater ials origin ating from the constr Unit One Contai nment Sphere . uction of the As expect ed the survey data indica ted the desire d varien ce betwee collec ted at widely varing soil classi ficati on areas, confir ming n data earlie r studie s that showed the highe st background readin gs in areas were the soil small JJa.rti cle size -e*g. less than
- 2 mm. . . - has a relate ly The readin gs obtain ed in the draina ge tunnel under Inters tate Highwa can be explai ned as the readin g are signif icantl y higher in the cente y 5 at either end. This leads one to believ e the readin gs obtain ed r than in of the tunnel are influe nced by the the buildu p of natura lly occur the center ring airbon ie radioa ctivit y due to lack of venela tion in the center of the tunnel sistan t source repres ented by the concre te. and a con-In summation it should be stated that the purpos e of this survey was to compare two adjace nt areas for radiat ion levels knowing one simply suspec t and the other was not. 'Ihe instru menta tion and techni ~ues area was consid ered adeq_uate to accom plish this effort . It should be noted used are that Ludlum Model 19 Nicro- Roente gen meter is calibr ated on the 0-25 Micro- the Scale by pulse signal only becaus e of presumed background radiat ion Roente gen interf erenc e negati ng the possi bility of source calibr ation. The record s of the bratio n on the subjec t scale was unava ilable from the Instru ment curren t cali-depart ment but linear ity checks to known ranges confin ned a roughl and Calibr ation y accur ate calibr ation. Each survey point was marked with a white tape marked grid locati on and sequen ce number for later refere nce or resuxv ey. with the if attemp ted, would hopef ully use an instru ment with much larger Resurv ey, cryst al size and be shield ed from atmos pheric interf erenc e using signif icantl y longe r data aquis ition times at each survey point. From the result s of this initia l extens ive survey there appear s very little need to attemp t such a resurv ey.
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