ML20037A966

Requests Revisions to 10CFR20.203(C)-2 Exemption Re High Radiation Areas & Number & Use of Keys in Controlled Areas

ML20037A966
Person / Time
Site:	Dresden
Issue date:	10/21/1963
From:	Wade I COMMONWEALTH EDISON CO.
To:	Lowenstein R US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 8008250852
Download: ML20037A966 (9)

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.II October 21, 1963/\\ e 7A

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A > @y Mr. Robert Lowenstein, Director lC 4

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Division of Licensiny and Regulation U. S.

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?r. Lcwenstein:

s, By letter dated.tuqust 23, 19n2, the Cornission

ran 2d Comnenwealth Edison Connany execntion fren the recu;r?-

cents of Parar,raph 20.203(c)-2 of 10 C 1 20 which portains to the use of visible and audible alarns for high radittien areas.

Two revisions to this exenption are recuested:

I.

Continued reactor operations, additions and/or 'odifications of equienent have contributed to increases in radiation levels in various arets of the,lant.

In certain instances these increases have been of such nnnitude that their status has been chance te "!!i;h ladiation trea".

iherever possible, corrective reasures.have been taken to clininate these i, creases, however, in a few instances these acasures have been impractical or without si?,nificant effect.

Those areas wherein dose rates could not be-decreased have been established as permanent high radiation areas and have been properly posted and-included in Dresden's locked high radiation area procedure.

The following high radiation areas have been added to those described in our application of April 17, 1962 and Connon-wealth Edison hereby reqmests that the procedures referred to in that application and the exemption granted by your letter of August 23, 1.962 be extended to cover these areas, outlined by a double broken black line on the attached sketches.

(a)

In the August 23 letter and in our request dated

.\\p ri l 17, 1962, it was noted that there was one high radiation area adjacent to the :iigh pressure end of the turhinc shich was enclosed by a fence with a locked gate.

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?tr. Robert Lowenstein October 21, 1963 Increased r64intion from the turbine. cross-over pipes

'has caused us to enlargi this area to include the entire low pressure section of thesturbine and to re-arrange the fence -for ' simplification as shown~ on Sketch 3.

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'(b)

The filters in the railiation waste facility: basement -

used for filtering. water from the rea'ctor, fue11 pool and niscellanonus radionctive waste collector tanks

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are installed in a vault located ~in the radiation waste

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facility as shown on.iketch 3.

The cccumulation:of demosits over the :eriod of oberation has, increased

.he level of radiation to the level _-recuirin3 this" a ntr~ into_this c

30 nc st ad as a "'li;h 7a,!iaticr irea".

2str.ctid excent te "erfern Mainton.cnce Work.

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There are two.linuia vaste centrifuges located in'the

- _ Sc radiation waste f acility as shcun on "".at c!

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T second centrifune was a?ded last winter and the denosits-on the eaui;nent anc the walls of the roons hav2 caused d,s "'!i Ih 'adiation 3.res.".

these areas to be ~ste 2ntry inta thesa recrs is restrictel ancept O c

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naintencnce wcr':.

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"he radin* inn Icv??

n t'e 302' level'below th? reactor, 3.msn or.:e:c?

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this area has been enc:rsed Sv 1 fence and a l ec': ed 3.tc.

The cause of the increase in radiation level is the gradual accumulation of deposits fron reactor water in the reactor scran dump' tank located in this area.

i (c)

The "off-gas" noniters,. located'as shown on Sketch E, are equipped with condensers for renoving noisture from the sample.

These condensers accumulate radio-active deposits to the extent that the aren has been posted as a "!!igh ladiation Area".

II.

The letter of August 23, 1962Lalso approved'the' procedures outlined in our recuest of April 17, 1962 concerning the number and use of keys to the locks on the controlled areas.

This provided for one key to be available during operation i-and three keys during plant shutdown.

Experience with the increased nunber of high radiation areas has demonstrated that the use of ene key during operations is inadequate and causes objectionabic delays in. returning.

the single key sa that other areas nay be entered.

This.is especially true~durint the day' shift when the maintenance force is doing work in a high radiation area.

There are.

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.3 fr'. Robert Lowenstein October 21, 1963 1

locked high radiation areas in the-reactor containment sphere, turbir:e building, n'id the rndiation vaste area.

'rompt access to these areas should_ not Se delayed by the.

necessity of~first obtainin;; the key from sene other area, i

Use of the second ke durin', 0- eration, vill be controlled by the same procedures as now used.for the first key.

It will be kept..in the control roon when not in use and will-be issued by the Shift Sn.;ineer.

3 separata Ic: will'Se i:ept el the use of each key.

Cc~.nonvenith Ediso Cemany renuests that the-nuthtrits.ticF in your Ictter of Au<:ust 23, 1962 for the'une of one. key s 'tip radistian acons urin; 21. mat ope m ien a atended to cinit the USc 7 ? t'm

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