ML20210G697

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs Page 3-39,correcting Typo in Basis Re Storage & Handling of Fuel
ML20210G697
Person / Time
Site: MIT Nuclear Research Reactor
Issue date: 07/30/1999
From:
MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE
To:
Shared Package
ML20210G685 List:
References
NUDOCS 9908030184
Download: ML20210G697 (1)


Text

r..- J

-g.

i ,,

t.

I It has been calculated that fuel elements when stored in the locations

]

specified in 2b,2c,2d,3b,3c,3d, and 3e will have a calculated effective multiplication (kerr) factor of less than 0.9 under optimum conditions of j water moderation.

These specifications are also conservative for criticality safe handling

)

)

of MITR-1 fuel alone or in combination with MITR-II fuel.

The chief additional problems with spent fuel are those of shielding personnel from the emitted fission product gamma rays and preventing melting from afterheat. The shielding requirement is met by utilizing a shielded transfer flask (item 3e) for movements and temporary storage and more permanent ,

i shielding as indicated in 3a, b, c, and d. The requirement to prevent melting is

]

met by specifying that four days elapse between use of the fuel element in a core operating above 100 kW and removal of the element from the reactor pool.

1 This decay time was determined from experience wid1 the MITR-I combined with I 1

a conservative assumption of doubling the power density for the MITR-II.

The specification on removal of control element provides that the stuck rod criteria will always be met, even when one blade is removed for repair.

Thus, the reactor still would not go critical on the removal of a second con- ,

trol element.

9908030184 990730 3-39 PDR ADOCK 05000020 p PDR L