ML19350A345

Suppls 801216,30 & 810202 Responses to 801126 Health Physics Evaluation.Includes Items 22-16,22-19,22-34 & 22-36

ML19350A345
Person / Time
Site:	Three Mile Island
Issue date:	02/27/1981
From:	Arnold R METROPOLITAN EDISON CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19350A334	List: ML19350A333 ML19350A336 ML19350A339 ML19350A340 ML19350A342 ML19350A343 ML19350A345
References
L1L-063, L1L-63, NUDOCS 8103130563
Download: ML19350A345 (2)

Text

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• ' ' Metropolitan Edison Company

/ y J Post Office Box 480 m r_1_~ ' _j __ E Miceletown, Pennsylvania 17057 717 944-1041 wnter's Direct 0.at Numcer February 27, 1981 LlL-063 Office of Inspectica and Enforce =ent Attu: 3. H. Grier, Director Region I U. S. Nuclear Regulatory Com=ission 631 Park Avenue King of Prussia, PA 19406 Three Mile Island Nuclear Station, Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Health Physics Evaluation

Dear Sir:

In telephone conversations with members of your staff, we were advised that supplemental information was desired to the responses given in my December 16 and 30, 1980 and February 2,1981 letters.

This additional information is necessary to close those ite=s identified in l ycur November 26, 1980 letter as requiring resolution prior to restart.

The supplemental responses which are enclosed have been reviewed and agreed to by = embers of our respective staff a.

Sincerely 1

/

l R. C. .i ld Chief Operating Executive RQ:WEP :JRP :bj o

! Enclosu.e l cc: L. Barrett R. W. Reid V. Stallo 8108130 M w=c e ,=- == cn. , = u ,-a=, = - s ,s e-

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SUPPLEMENTAL RIS?CNSE TO }E"-ED Lt,..:.R DA*ED DECEMBER 30, 1980:

Ita= 22-16:

The Training Depart =en: Ad=inistrative Manual describes progra=s already in place in :Fe areas of Radiological Centrols, General E=ployee, Kad Waste Training and the Ins::uctor Develop =en: Program. Therefore, for=al i=ple=entatica for those areas is the date of issue of :he =anual.

SUPPLEMENTAL RES?CNSE TO MET-ED Lt...:R DA ED FE3R"ARY 2,1981:

I:em 22-19:

With noted excepticas, the beta correction factors used fer ~MI Station are based on a natural uranium cor:ee:1on fae:or. Cc= pared vi:h a Strontiu= 90 beta correction f ae:or, :his is a "conserva:ive" c higher fact =:; therefore, if used in a beta radiatics field eacposed of =ixed isotopes, sc=e of which were 5:ron-

iu= 90, use of :his factor would yield a slightly higher expesure indication.

This correc:icn fae:c: is deter =ined by :echnical persennel and then p cgrammed into the ce=puter for au:c a:ic be:a in:e:preta:ic: and requires no =anipula:icns' or calcula:1cus en the part of the TLD equipment operator. Likewise, some Stren-tium 90 activi:7 in a beta field vill yield sligh:1y higher a_xposure 12.dications en the gn=ca ccupenant. Since, in =os: areas, this is a s=all percentage and the exposure indications are higher than actual (conservative), no:: ally no correction is made. In some areas of Uni: 2, v.are significant quantities of Stren:1== 90 are found, dose assessments by tachescal persennel are made en a case basis where the indicated exusure warrants. Entry to these areas is rigidly controlled and requires ec=plation of detailed data sheets and approval Director, Radiological Controls Uni: 2.

I:em 22-3/.:

The hand and foot counters are currently being electronically cali~::ated and

~

source checked. A procedure change is undergoing review and app:cval which will for=alize this calibra:Lon/ source check. *he revision vill be issued by May 30, 1981.

Ita= 22-36: .

Licensee has confirmed the appropria:eness of centinued use of the presen:

de:ector counting efficiency facter. This is based on a repor: of calibra:1cn da:ed July 12, 1979 supplied by the source vender and a repor: f::= :he Na:icnal Bureau cf Standards dated August 22, 1979, both of which indica:e a finding of essentially the same calibratica source surf ace a=issien ra:e. Nevertheless, we are pursuing the questien of source =ediu= and have placed an order for f11:e

=edia scurces vi:h a fir = in Calif ornia. Af:e receipt of these scurces, checks including auteradiographs will be condue:ed by licensee. Additionally, 1: is in-tended tha: the sources be sent to N35 for : heir certification. Af:e: :he scurces are re:urned fre= NES, efficiency studies will be conducted by licensee. The NRC will be advised vi:hin 60 days of our progress en procure =ea.:, ch. eking and certi-fica:icn of :he f11:e: =edium source, and af:e: c:=pletica of the ifficfency s:udies, the NRC will be infor:ed of the findings.

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