ML20086K465

GGNS Unit 1 Cycle 6 Proposed Startup Physics Tests

ML20086K465
Person / Time
Site:	Grand Gulf
Issue date:	12/31/1991
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML19353B429	List: ML20086K407 ML20086K440 ML20086K461 ML20086K465 ML20086K474 ML20086K499 ML20086K511 ML20086K519
References
GNRO-91-00186, GNRO-91-186, NUDOCS 9112130128
Download: ML20086K465 (3)

Text

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Grand Gulf'Nue' ear Station Unit 1 Attachment 5 to Cycle 6 Proposed Startup Physics Tests GNRO 91/00186 Page 1 of 2 GGNS UNIT 1 CYCLE 6 PROPOSED STARTUP PHYSICS TESTS DECEMBER 1991 l

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9112130128 911205 FDR ADOCK 00000416 P PDR

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Grand Guli Nuclear Station Unit 1 Attachu.ent 5 to Cycle 6 Proposed Startup Physics Tests GNRO-91/00186 Page 2 of 2 Proposed Startup Physics Tests for Cycle 6 9

1. Core Loading Verification The core will be visually checked to verify conformance to the vendor supplied <

core loading pattern. Fuel assembly serial numbers, bundie orientations, and core locations will be recorded. A height check will be performed to assure that all assemblies are properly seated in their respective locations.

2. Control Rod Functional Testing Prior to criticality following

• s refueling outage, functiona' testing of the control rods will be performed to assure proper operability. T his testing will include

' coupling verification, withdrawal and insertion timing, and friction testing where required.

3. Shutdown Margin Determination Control rods will be withdrawn in their standard sequence until criticality is achieved. The shutdown margin of the core will be determined from calculations based upon the critical rod pattern, the reactor period, and the moderator temperature. To assure there is no reactivity anomaly, the actual critical control rod position will be verified to be within 1 % dk/k of the predicted critical control rod position.

4. TIP Asymmetry A gross asymmetry check will be performed as part of e detailed statistical uncertainty evaluation of the TIP system. A complete set of TIP data will be obtained at a steady state, equilibrium xenon condition greatar than 85% rated power. A total average deviation or uncertainty will be determined for all symmetric TIP pairs as well as the maximum absolute deviation. The results will be evaluated to assure proper operation of the TIP system and symmetry of the core loading.

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Attachment 6 to GNRO-91/00186

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