ML20128N489
| ML20128N489 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/01/1984 |
| From: | Boldt G, Smith E GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20128N462 | List: |
| References | |
| 15737-2-G03-106, 15737-2-G03-106-R05, 15737-2-G3-106, 15737-2-G3-106-R5, NUDOCS 8506030293 | |
| Download: ML20128N489 (3) | |
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Nuclear 13737-2-c03-106 PAGE OF Title Technical Evaluation Report for Defueling Water Cleanup System 2
19 Rev.
SUMMARY
OF CHANGE O
Initial issue November 1, 1984 1
Revised to incorporate system design changes and comments on Revision 0 2
Revised to incorporate comments on Revision 1 3
Revised to incorporate comments on Revision 2 4
Revised to reflect addition of relief valves at the outlets of the defueling filter canisters, deletion of fuel pool cleanup system boronometer and correction of minor typographical errors 5
Revised to correct and clarify description of lov level alarm setpoints for fuel transfer canal l
l EPD 33615 11'64
15737-2-G03-106 canister and SDS is equipped with two filters in series, both of which have borosilicate glass to control reactivity (see Raf 2).
Differential pressure is measured across the filters to indicate ruptured filter media. The SDS filter bypass is administrative 1y controlled to prevent inadvertent operation.
Upon detection of a filter media rupture the filter trains will be isolated and the ruptured filter will be identified by observing the differential pressure versus flow for each individual canister with flow being recirculated to the fuel pool. A lower differential pressure for a given flow will indicate which filter'is ruptured. The affected canister or canisters and the SDS pre-filter vessel or filter canister post filter cartridge would then be replaced as required and the system restarted.
3.2.2.4 Line Break If a rupture occurred in the FTC/ spent fue) pool cleanup system, the DWC system spent fuel pool pumps could deliver fuel transfer canal and/or spent fuel pool water to the Fuel Handling Building or the Reactor Building. This action would lower the level in the canal and the pool. A drop of one inch in canal / pool level is approximately equivalent to 1250 gal. A level loss would be detected by redundant level indicating systems, one each for the FTC and spent fuel pool, which are provided with low level 5
alarms in the main control room. The low level alarm will actuate at E1.327'-1".
Upon receipt of either low level alarm, the system will be manually shut down.
Process water hoses are employed in three services in this system; filter canister inlet / outlet, skimmers to well pumps, and downstream of penetration R-539.
If a filter canister inlet / outlet hose ruptures, that canister will be isolated and the hose replaced.
Since these hoses are submerged in the SFP, this results in no net water loss.
If a hose connecting the skimmer to the well pumps breaks, then the ability to surface skin will be hampered or lost, but pump capacity will not be diminished as the hose is routed underwater to the pumps and a pump suction supply will continue to be available.
, Rev. 5 0058Y