ML18079B055

Affidavit of RP Douglas Re Calculation of Estimated Dose Associated W/Moving & Storing Spent Fuel from Unit 1

ML18079B055
Person / Time
Site:	Salem
Issue date:	08/21/1979
From:	Douglas R Public Service Enterprise Group
To:
Shared Package
ML18079B054	List: ML18079B053 ML18079B055
References
NUDOCS 7910050772
Download: ML18079B055 (6)

Text

1 \

• e STATE OF NEW JERSEY )

) SS.

COUNTY OF ESSEX )

AFFIDAVIT OF ROBERT P. DOUGLAS ROBERT P. DOUGLAS, being first duly sworn accord-ing to law, deposes and states:

l. I am employed by Public Service Electric & Gas Company as Licensing Manager* and Acting Environment Manager.

My professional qualifications which I incorporate by reference herein are contained in the transcript of this proceeding following Tr. 402. v*

2. I have supervised the calculation of the es-timated dose associated with moving and storing spent fuel from the unenlarged (264 spaces) Salem Unit 1 to the enlarged (1170 spaces) spent fuel pool of Salem.Unit 2. As shown in Attachment 1, hereto which is also incorporated herein, the dose resulting from moving one cask containing two fuel assemblies is approximately 0.4 man ra~. This dose does not include the additional .dose associated with the transfer of fuel from Unit 2 to Unit l if disposal is not available offsite and the Unit l pool must then be enlarged.

3. I have also established the nu.'llber of spent fuel elements which will have to be transferred from Unit 1 to Unit 2 if the above described scheme is to be carried out in accordance with the latest information concerning schedule and number of spent fuel elements to be discharged after -Z.. ~

'191000*0 I r.

,.

• each cycle. As shown in Attachment 2, which is incorporated by reference herein, the number of spent fuel elements to be transferred is 500. Thus the total man rem exposure as-sociated with such a transfer is 0.4 x 250 = 100, considerably greater than the 2-5 man rem associated with changing the racks in Unit I with sp.ent fuel elements in the pool.

4. I thus conclude that, among other reasons, it is preferable to expand the*tJnit 1 spent fuel pool rather than shipping the spent fuel to an enlarged Unit 2 spent fuel pool.

I I

• • I

. I Sworn. and subscribed to before me this .*~(.*cl day of. t 1979 J NOTARY PUBLIC __/

V*RONICA I.. ADAMS My Commission exp*ires . A Hotary Public ot Hew Jersey

• 111, e.imnisslan Up"es Oct. 23, 198z

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SALEM NO. 1 UNIT Estimated dose from moving and storing spent fuel from Unit No. 1 in the Unit No. 2 spent fuel pool.

STEP* DOSE (man-mrem/yr) l.) 6 operators to unload spent fuel cask, place in decon pit and wash down, place in transfer pool and remove head.

6 people x 3 hrs. x 3.5 mr/hr. = 63

2) 6 operators to load 2 fuel assemblies in a cra~k (one per~on to operate bridge, one to operate crane, one to operate fuel handling tools, 1 health physics and 2 to record assemblies moved.

6: people x 10 minutes/assembly x 2 assemblies. x 3~5 mr/hr. = 7 .. o .

3) 6 people for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to set cask head.

6 people x l hr. x 3.5 mr/hr. = 21

~-*

4) 6 operators for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> (1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to decon cask, 1. hour to load cask on truck) on average 10 mr/hr field.

6 people x 2 hrs *. x 10 mr/hr. = 120

5) Truck driver and assistant approximately 15 minutes to drive from Unit l to Unit 2 fuel handling building (approx. 5 mr/hr.

in cab.

2 people x 15 hrs. x 5.0 mr/hr. = 2.s E>O

6) 6 operators to unload, rinse down, and place cask irr fuel transfer pool

( 2 hrs)

• 6 people x 2 hrs. x 10 mr/hr. = 120

7) 6 people to remove cask head at transfer pool. (approx. 1 hr.).

6 people x 1 hr. x 3.5 mr/hr. = 21

8) 6 operators to move 2 fuel assemblies from cask to racks (approx. 10 minutes/

assembly).

6 people x 20 hrs. x 3.5 mr/hr. = 7.0 E>O

.. . ~

STEP* DOSE (man-mrem/hr)

9) . 6 operators for l hour to set cask head.

6 people x 3.5 mr/hr. x l hr. = 21

10) 6 operators for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to decon cask and load on truck to return to Unit No. l (cask empty, approx. l mr/hr.).

6 people _x 2 hrs. x l mr/hr. = 12

11) Truck driver and assistant for approxi-

• mately 15 minutes to return to Unit No. l at .s mr/hr.

2 people x 15 hrs. x .5 mr/hr. = . 15

""GO Total man-rem for moving one cask 395 man-mrem (2 fuel assemblies) from Unit No. l or spent fuel tool to Unit No. 2 spent fuel pool. approx. O. 4 man-rem

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• l) The 3.5 mrem/hr dose rate used in several steps of the estimate is based on the dose rate at the fuel pool and transfer pool water surface due to one spent fuel assembly being moved and the dose rate contribution from radionuclides expected to be in the water.

2) The fuel shipping cask dose rates are based on 49 CFR 173 limits of 10 mrem/hr at six feet from shipping cask. It is feet that this is representa-tive of average radiation field operators will be exposed to.

RAZ :cm 8/21/79 5Ll 50-A

_!_I FUEL ELEMENTS SHIPPED FROM SALEM UNI'f l 'l'O SAJJEM UNIT 2 IF ONLY 'l'HE UNIT 2 SPENT FUEL POOL IS EXPl\NDED Discharged From Stored In Unit 1 Shipped to Unit 2 Discharged From Year Unit 1 Spent Fuel Pool Spent Fuel Pool Unit 2 1979 40 40 1980 52 52 1981 56 56 52 1982 56 56 56 1903 56 56 56 1984 56 4 52 56 1985 56 56 56 1906 56 56 56 1987 56 56 56 1908 56 56 56 1909 56 56 56 1990 56 56 56 1991 56 56 56 1992 56 56 56 264 500 + 660 =

1168 in Unit 2 spent fuel pool

..,.

_!_I 'l'he purpose of this table is only to calculate the total number of spent fuel as-semblies to be transferred and does not represent any final specific scheme for

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