ML19224B744
| ML19224B744 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/07/1979 |
| From: | Kinney W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Galen Smith NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 7906220189 | |
| Download: ML19224B744 (3) | |
Text
A-U'JtTE D ST ATES s'
f*
4, NtJCLE AR HE GUL ATORY CO*/ J.lS lON Q
. cum;s
', j su m ns f.v:. ;c v.m c, r r u u _ u a. eu.r. v i.v f. i a n,oc
- a..<
May 7, 1979
- ' iOR/u,0U:1 FOR :
G. II. Emith w
?PGM:
W.W.
Kinacy SLBs.GT:
iAY 7, 19 79 LIPDXIE OF ',lEAI/al ElYST CS STA1US OF 'i!ME
- t f l.E i SL s a,0:! E.'R STATIO::S, !!. ' TS 1&2 The att::ched in for.ation as faxed to IE:llo for use in a memorandum frem Cossick to the Cennis sion.
W.
W-Kinney
- _ ?ccure:
.s ctaLed 7 9 0 e g g0irry go-w P 254 Y36 ac<stfM 7*'/E j
~
!! F ' '_T_ H. _v. m_._S_T _CS. S T A'I US. _OF_,Ti t a '
..m. i E_
1 s Li :D.:t el AR Sr.;Tly:S, i ;; ii S IE2
.i4 a y_7, 19/9 1
?
U._ NIT 2 STATUS Prior to the TMI accident of March 28, 1979, Unit 2 had only operaten for
.aout 90 days.
This new unit had not built up sinnificant 1cvels of rrdioact ivity within the systcirs and ccnsequcntly the plant "as very " clean."
Although access to the Auxiliacy ar.d Fuel H ndling Building uas ccatrolicd q
for re diological conditions, the general cui: face areas ;ece not c on t a:aina t ed cud the rmliation c.reas along the cocridecs
?re vecy lew, snerally lecs then 1 ac/hr, cnd the.e was y crally no..i % ne,:c t ivi t y.
Since the time of t he ric c i.'.n t, strEn dat r -d iel ogic al con t rols h.:ve kca i c o s.:d for entries into the Mxiliary ind Fuel Handling Building >:id no occess has been pe r:aitted into the :ent inment Build in g.
Galy -i.ight increase = in radiation levels have occurred in the Turbine Building due to epecati.aal changes.
Coner21 area ecdiation levels in t he Turbine Boi! ding are 0.1 nr/hr, wit h cccasicnal airborne.ctivity which is mostly less than 10 to 207. of,1 ci:
. f.s
,ible cc,c.:
- . c a i o s (M cc) foc accupational noe irs.
W rdio1 %ical ch yes ~ithin the
- uxil ic cj nad : Del 'N.dling luilding b. :e ',en d ca-atic.
%e
.o
. idevcend hi';h c ad i a t ion levels eith ny areas. m ur'ag in the a eral R/hr r,n:;e.
S ay localized hot spots
- nd certain t a a.; '.,ee
- ig i.ficcitly hi). r r
- diatien lesels.
Corridors L.. cc11y.uatuce f : c., 50
'/hr to 1.5 1/Lc (1500 nR/hr) at this t ir.e,
tile readin;s
't t he hon :iy of some cubicles are scuter then 1000 R/hr.
A m cific e gle of the cM s;e is ihe
'osp cal.c sallery which is on
.he 335 ft. e1<varion of the fue l hoadl ing ',uild ing.
Be fo re the accident, the radiatica 1cvel at the deoneay was a f.;w mR/hr.
About 1 day after the accident the icvel,as 750 R/hr, about 200 R/hr on April 10, and 60 R/hr.
on *pril 23.
Preliminary deconteaination e fforts in certain corridors of the auxiliary building have successfully reduced gross ccntamination icvels for those, areas but for the most part the building has very high surface contamination Icvels.
Airborne activity currently runs in the r snge of 10-7 to 10-8 uCi/cc of iodine-131 in the corridors with levels of 10-6 uCi/cc iodine-131 in specific rooms and cubicles.
Radiation levels in the Unit 2 containment are uncertain.
The containment doma ncnitor (HFR-214) reading on May 7, 1979 at 0730 was 80 R/hr (detector is chielded with 4" of Icad - a correctica factor of 100 applied would indicate radiation Icvels of-8000R/hr @ detector).
Several calculations of rad levels in containment made by NRC personnel (based on gaseous activity sample from containment) range from 60 R/hr to 2000 R/hr.
The location of the dome monitor is ~7' of f the floor (our doorway located on refueling floor). There are no radiation monitoring capabilitics operable in areas belev the refueling floor.
Radiatien measurements are and have been taken by NRC-I&E personnel at the outer door of the containment personnel access hatch (glass port in outer door).
Previous measurements on April 3, 1979 revealedk 4
r adia tion Icvels of ~ 90 i.tR/h r ..t con t ac t wi th th.r glasu ;>o r t. .;ost radi,ation racasuccmcats on May 5, 19/9 tere 25 >>R/hr at glass port. recent An air semple uns taken from the Unit 2 containment on Itay 4, 1979 at 9:00 p.m. Results of that sample are as follous: Kr-85 6.28 E-91 /f Ci/cc ci/cc I-131 2.78 E-03 Xc-133m 6.08 E -02 e" Ci/cc '~ Ci/cc Xc-133 9.39 Et00 f U s'IT 1 Ai U L1 A:<Y STA (US Certain areas of the Unit 1 cuxiliary building have experienced radiologtcal changes as a result of the occident 'ut to a much lesser de' n e than Unit 2. Because the Unit 2 pr. nary scaples are obtained s in the Unit i nuclear scripl i - oem, this room har bccome highly c on t:" d n.ited and has general a_ea radir.tica levels of 1 to 3 R/hr. 'ihe l'n it 1 c.rimary c'icmist ry lab, which is ad jccent to the nuclear sampling rcom, also has significant surface coat;uMnation. (S.mple lescis travecsing the fuci haadling building leadiag from Unit 2 to the '.ple roca now (5/7) readfng about 100 n3/hr about 7' above the ficcr cn the 305' level.) The 1.r.-r level (281 e1.. ) o f the Un i t 1 ~uxiliary building is coatetinated in the vicinity of processli.g.<,uir.,ent
- ith r. diation levels ;;enerally less than 500 cR/hr near the c io i. p men t.
254 35% .}}