ML20236C124

Forwards Portion of Document Requested by NRC & Inadvertently Omitted from Util 870304 Application for Amend to License.Encl Documentation Should Replace Prior Submittal

ML20236C124
Person / Time
Site:	Peach Bottom
Issue date:	07/23/1987
From:	Gallagher J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T Office of Nuclear Reactor Regulation
References
NUDOCS 8707290343
Download: ML20236C124 (11)

Text

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PHILADELPHIA ELECTRIC -COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA, PA.19101 12151 841 5001 Jossea w. ay,Laysia July 23, 1987 NWCLEAR OPER AftONS Docket No. 50-171~

Dr. T. E. Murley, Director.

Office of Nuclear Reactor Regulation Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555

REFERENCE:

. Peach Bottom Atomic Power Station Unit No.1 Amendment Application filed March 4, 1987.

l

Dear Dr. Murley:

An Amendment to Philadelphia Electric Company's November 24, 1975 Application for Amendment of f acility Operating License.DPR-12 was filed with the Commission on March 4, 1987. The filing included a copy.of. a document entitled "Information Requested in Enclosure No. 2 of NRC Correspondence dated May 7, 1986".

Recently, we were informed that Figure 3.13 in the document had been excluded..To remedy the oversight, we are refiling the document _ with figure 3.13 included, and request that.the document be substituted for the one submitted with March 4, 1987-Amendment Application. We apoligize for any inconvenience resulting from this error.

Yours truly, i

cc:

Addressee W. T. Russell, Administrator, Region I. USNRC i

T. P. Johnson, Resident Site Inspector 8707290343 870723 DR ADOCK 05000171 PDR l

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PEACH BOTTOM ATOMIC POWER STATION UNIT NO. I INFORMATION REQUESTED IN ENCLOSURE NO. 2 OF j

NRC CORRESPONDENCE DATED MAY 7, 1986 DOCKET NO. 50-171 i.

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s-Question 1 Provide an updated inventory of radionuclides (current curie quantitles) as previously tabulated on page 34 of your May 15, 1975 Decommissioning Plan.

Include niobitnw94, europlunr152 and carbon-14 in the updated table.

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Response

Figure 3.11-la (Rev. 1) of the May 15, 1975 Decommissioning Plan is attached to include niobiun -94, europlun -152, carbon -14, and copper

-64 isotopes.

In addition, the estimated values for the other Isotopes listed in the Figure have been revised to reflect more current conservative assumptions.

Figure 3.12 is attached to provide the activation source strengths for the isotopes listed in Figure 3.11-la 4

(Rev.1) as of January 1,1987.

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Question 2 Provide a second table that project:s the radioactive inventory at the' tirne you intend to renove residual radioactivity frcm Peach Bottcm 1.

Response

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' Question'3 l

Provide an estirnate of the deposited activlt (contamination) as shcwn in Figure 3.11-2 of your Deccmnissioning Plan for the tirnes indicated I

in items 1 & 2 above.

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Response

Figure 3.11-2 (Rev. 1) is attached to include estimates of deposited activity on the interior surfaces of the reactor coolant system on January 1, 1987, and January 1, 2027.

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l Deposited Activity.on~.the Interior Surfaces

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Cs-137 l

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TOTALS l

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Question 4 Identify any benefits that result from your proposed delay in removal l

of the residual radioactivity with respect to: The methods that would be used in renoving radioactivity, any reduction in the total person-Rem exposure to workers, and reduction -In the voltrne of radioactive waste produced during dismantilng.

Provide graphs of ganma

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removing residual radioactivity.

l.

Response

l Ntrnerous radiological and ALARA benefits result from delaying the' final j

decontamination and removal of residual radioactivity, i

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Experience gained from the dismantling of other sites'and f

technological advances in the area of' robotics and the

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handling of radwaste should reduce the radiation exposure to i

i personnel involved in the eventual renoval of residual radioactivity and equipment disassembly.

2)

Delaying the final decommissioning by 40 years will lower the ganma activity of the activated steel components in the reactor by a factor of approximately 200 (the primary gamma emitter is Co-60 with a half-life of 5.2 years). Likewise, l

the total activity will be reduced by'a factor of 18 over the' same time period. Therefore, we can expect a proportionate j

reduction in total person-REM exposure to workers decontaminating and dismantilng equipment.-

3)

Advances in the handling and compaction of.radwaste should reduce the voltrne of radioactive waste associated with the dismantling and decontamination.

4)

Delay in the renoval of.. residual radioactivity from Unit 1 should likewise minimize the potential hazards resulting from airborne radlation sources to onsite personnel involved with the operations of Units 2 and 3.

5)

Since the DECON alternative is not presently viable for Peach Bottom Unit 1, detailed radiation studies associat'ed with plant disassembly have not been performed. Consequently, detailed ganma radiation exposure graphs and data are unavailable at this time. However, based on the argtments stated previously, it can be expected that delay in the renoval of residual radioactivity from the site to the year 2027 should result in a proportionate reduction In the ganma person-REM exposure to workers by a factor of' approximately 200. When the ultimate decommissioning plans for Peach I

Bottcm Unit 1 are developed, evaluations of worker radiation exposure during removal' of residual activity will be perforTned.

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Question 5 Enclosure No. 3 (Letters from the NRC to Stanford University)' states our present criteria for release of a facill.ty to unrestricted access.

Provide an evaluation of the predicted radiation levels in buildings, rooms, and structures relative to that criteria at the time in which you intend to remove the residual radioactivity. Will any structures meet Enclosure No. 3 criteria at that time without further decontamination?

Response

.Since the DECON alternative is not presently viable for Peach Bottom Unit 1, detailed studies to predict radiation levels in buildings, rooms, and structures at'the time of disassembly have not yet been-

. hen the ultimate decorrmissioning plans for Peach Bottom performed.

W Unit I are developed, such an evaluation will be performed and the results canpared to the NRC criteria for release of the facility to unrestricted access which are in effect at that time.

CWW/cb/02028704 f

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