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. MAY 3 01975 Meno t.o Peter Knapp .
IODINE AND PARTICULATE RELEN SS - PlfGRIM 1 Seanv On May 2. and 5,1975, I te1< phened J. EienyQ Pilgrin 1 Technical Engineer, to discuss the noot recent events relate I to Pilgrim':- ,
.on-goiag jodir.a :nd particulate (T6P) release rate problem. i
'Glkip in .m. war to ny questicas , relat ed the follm:ing lufornation
{
3 to ne:
- l. The picnt had cenained in a cold sh'itdown raode fron April 23 to April 26, 1975. On April 27 an att q.ted startop uas aborted due to e leahing Tar.et P ;c:- relic. ; S c - A shutdo~n t.an then ,
instituted before LL. reactor prerr .s reached 500 paig. '
- 2. Bef ore atter:oring the April 27 ar t: .; , Pilprin info:ned D. Caphton that t h--y h wi inntal' ad a ' arc.e ch a n.e 9 3 fi?ter in an cleva ted
- pc.rtion of the enndane-ur hc .rea the pu r; e: s of filtecing iodin; r en:, Lt:c yach: u to:1017- cr: (n tion 1;cm prior to Itc en...rief the i'.'ac r o c
. ilfiar i.cntil cic s y s t eri .
TF -'could ca.'; hrvc .i 'Ic;t o i ; b :: t . ", thte JcMnc reler.ses ,
1 i
C.'I D F t in f rCl; i t C f.. 1:h t. D s . Otht . G.)U'CeL i n tile tUrbiite Vellti-1:a te n ~ o ' , a ic h .s e c o . ' ~ t a ic :J:o- snr.p'.;'3 cata accorn.tn for f.OS L O 90 v[ lhO 1027:1a ~" re'.3%* r ?. t e at the '3n:Tt Vent d t fi .17 00;I ll OperJtlon .
.r, LhiJ ; i [ ICD t io.1 14'old UDVC 1;O C f f t.Ct f
en cahacir ihe e: 1. .c
.:t as c: 7
-!lenced don ca !
nh u t c' c ..n i .: ' . , r .: c a.. e . 2 c. . !ny, o;mrotton ..her. r. - actor cicanup rcsinn s_'enta: .:' n: :b cc nce ':.ra ti ona c 2 TF.P 's a re t r . . < f e + r e .t tc the rat. .:a :t. .a ::,ich nebscqu:nt> y produce r< !eanc . aC f. E " ' c , ,iit tion ', e t .
r'. , ,. to the plant ve;. L cv s tc :n . Tius ' a ; .. c : . . : ,cr.ed to hr.ve be, a re--
spoasi's1< in c 2.<cm.c: , . .m i .. , ; J.L.2 licit 2 for li.P'u in l
the pi.st (Duc. ?O, 19/r, I; e i4 er:.1 .mn. 2G, 1975). ,
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a.o u x.s h>a neun concic:arca a s ,. .
2 - u. . c. o sn a v s
e.. f coLicen.on period. Em. ver , , accord ia , to c erpretatica r.ade liy IC:I nanage:wn t , the 1S valve I ved er N C .: 20 a llo*;oble concen tra -
tient was noc in effect. Le: 4/26 and no AO retort was requJred cince the reactor ca, not opera ting ned ti e Tech Spec la a limiting condi-tJen for operation.
8606300146 PDR FOIA 860613 BURNSTEIB6-58 PDR C-IL
c.
- 3. The following data were given for the dates noted below:
Date hrr. Level % TS for I6P Comments 4/16/75 80% % 90% Began shutdown due to high I&P's i 4/21/75 60% 110%
4/22/75 60% 325% Shutdoun by 21d0 - High T&P's attributed to valve leak in sample line to turbiditeter follouing solids recovery systo- i (concentrated waste leaked !n 1 i pCi/iil 1 131 to floor) !
l 4/23 0% 185%
4/24 0% 82%
4/25 OE 61%
4/26 01 48%
4/27 0% 44% Attempted startup aborted due
- e leaking Target Rocket relicf va1 ce 4/28 0% 28X Acetcc.ulated % TS for reck = 1107.
4/29 0-50% 76% Startlng up 4/30 60Z 91% r 5/1 60 60% I 131 in nx coolant = 0.01 pCi/m3 5/2 60% 203% Sump punp failed to actiente- !
allouing raduaste sump to or:r c: c' on floor and beco:nc airborne I1 31 /,c t . in Rx co5lant - 0.011 !
i 5/3 00% 145% 1 131 Act. In Ex coolant c 0.012 l 5/4 60% 90% 1131 Act. in Rn coolant = 0 . n .' - ,
3/5 80% 91% 1131 Act, in n:: coolant n 0.C 09 l 1
hUithregardco the above d'ta, I have cont,tructed a set of curvet on Grap!u, 1 and 2 ae attacht..ent 1) showing the removal rates c' the I-131 fran the radwaste resulting from the spills on 4/22 and 3/2. The data points were corrected for I-131 decay, and I-131 cont.ributions from steam leaks and bachground plate-out where applicabic. As can be scen,both spills were renoved '(via drying and subsequent particulate cranation) to the plant vent with a similar half-life of N 1.7 days. By applying this curve in conjunction with I-131 decay
(
- Fot reportr b'- " T ' 3 . 8. B . " ! c.1 " t ier c - /* ar p[r T F : T interpretntion .'.nnotated on par,e 2.
factors. One should be able to predict the effect of future {
spills on plant vent ISP release rates as a function of time. .
l
- 4. The vent lincs leading to the Shrecal absorbers which vere placed on the evaporator vent, chenical vaste tank vent, flat bed filter vent and the clean vaste tank vent vere not all heat traced. This vould allou the I, absorption efficiency to deterioate as the noisture saturated air in the tank, infiltrated these absorbers.
- 5. There is no test of T, efficiency being periedically conducted on the above nentioned absorbers. The only neasurcm nt being nade is the analysis of an int egrated sample of the entire raduaste ventilation cysten. Soue of the abaarbers uere checked epon initial installation and found to have a DF for I of m 100. L.'it h ou t continuing to check the absorber I)F's an adequaFe I rc= oval efficiency cannat be assured.
- 6. Several of the raduaste tanks (such as the chemical vaste received,.
tank) have an cverflc. vent in additica t~ th, vent unich :r.' has an absorber in-line. .:cr:uily the ] cr.ana tine f re- the ta:.' should flou through the cent line uith the attached absorber; since, dua to the ventilation flot prth, this line is under negative pressure.
I!ouever, c'urir~, period , then the , P ccross the absorber increases ;
signif ican t1:. c.d/or the tank is filled rapidly, the I uill effectively I bypass the absorber by flcuing out throu;,h the overflou vent.
I feel that on the basis of the facts cantained in this remo and of tl.e history of the III' release probleu since late October 1974, that the c il" real solution can be effected by a rajer effort en PiJgrin's part. Th e .
far, Pilgrin has r.cde a feu token atte :7ts at solving their prcblems such as:
- 1. Installing temporary charcoal t.bsorbars (uith and uithout heat tracing) on selectee tanks who:.e actual ef ficiencies are rarely tested. .
- 2. Installa xa large cht_recal fil;cr in an area (condenser bay) - hich vill have no effect on the rc<.aste ventiletion systen T removat, cven though the pri.c.ary sourcc of excess ILI releases is tha radu ute.
system.
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4 kM
- o. ,
4
- 3. Changing the values of the parameters (sample flow, process flow, I retention factors and counting geometries) used for neasering I6P releases 30 as to avoid a TS vidation by a f eu per cent.
- 4. Employing a consultant I 1 feel that if there in a desire to reduce IEP relcase rate- to les:. than their present average re kly values of 4 80*100% of the TE limit, then IE:I should apply nore pressdre upon Filgrin to develop a nore compichensive and neaningful program thin that developed to date. The technical baq:s for the expected rc.saIt, of such .. pi c;;r.in should be clearly defined .n order for JE:1 to :,a.:e ita ara evaluation of the efficiencv of the pro;;r:u
~
in nect ing the design objective - reduc tion of iEP relea.:c , especially during transient and abuermi operations assoc wred with t be radwaste 7 y it er1.
If this is not done it r pears, that based on Pil.'-rim' , h istory thus far, we vill be cont ac.ually r , calvirq /.O report s rel: 4 a;; t o ITF cuissions periodically throughout Lbc year.
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