Design Features and Administrative Limits

DOE-STD-3007-93

The following design features and administratively controlled limits are necessary to

ensure the criticality safety of the system. Operation safety limits are set in the Plant Safety

Document (PSD) and the Technical Specifications (TS/S) associated with that operation.

7.1 Design Features

The BORAX V Superheater fuel has uranium gram loadings and enrichments at or below

those listed in this evaluation.

The BORAX V Superheater fuel has maintained its structural integrity, due to its material

compositions, such that its physical form does not grossly deviate from that listed in this

evaluation.

7.2 Administrative Limits

Each storage bucket stored on the basin floor will be limited to three BORAX V Superheater

fuel assemblies.

Storage buckets suspended from the monorail system will be limited to four Borax V

Superheater assemblies provided the buckets are preventively rigged to avoid dropping to the

basin floor. If the remaining hanging buckets are not preventively rigged, the limit per bucket

will be set at three BORAX V assemblies.

A row containing storage buckets placed on the floor will be limited to buckets containing

only BORAX V Superheater fuel assemblies. No other fuel types will be allowed in this row.

The summary and conclusions from this evaluation are given below:

Storage buckets that contain three (3) BORAX V Superheater fuel assemblies may be

stored on the floor of the north and middle basins without any restrictions upon spacing

between the storage buckets.

Only BORAX V Superheater peripheral and central assemblies were considered in the

evaluation. The storage of a single row of buckets containing BORAX V Superheater

fuel assemblies was evaluated. Interaction with other fuel types within the row was not

considered since other fuel types in a single row will be restricted through administrative

controls.

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