ML20196E933

Cycle 4 Proposed Startup Physics Tests

ML20196E933
Person / Time
Site:	Grand Gulf
Issue date:	11/30/1988
From:	SYSTEM ENERGY RESOURCES, INC.
To:
Shared Package
ML19295G794	List: AECM-88-0241, Application for Amend to License NPF-29,revising Tech Spec to Support Cycle 4 Reload for Facility.Fee Paid.Repts Re Reload forwarded.ANF-88-183(P) Withheld ML20196E919 ML20196E927 ML20196E933 ML20196E939 ML20196E956 ML20196E974
References
PROC-881130, NUDOCS 8812120140
Download: ML20196E933 (3)

Text

GGNS UNIT 1 CYCLE 4 PROPOSED STARTUP PHYSICS TESTS NOVEMBER 1988 e

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Proposed Startup Physics Tests for Cycle 4

1. Core loading Verification The core will be visually checked to verify confomance to the vendor supplied core loading pattern. Fuel assembly serial numbers, bundle orientations, and core locations will be recorded.

A height check will be perfomed to assure that all assemblies are reoperly seated in their respective locations.

2. Control Rod Functienal Testing Prior to criticality following the refueling outage, functional testing of the control rods will be performed to assure proper operability. This testing will include coupling verification, withdrawal and insertion timing, and friction testing where required. The suberiticality of the reloaded core with an individual control rod fully withdrawn will be verified by monitoring the nuclear instrumentation.

3. Shutdown Margin Detemination Control rods will be withdrawn in their standard sequence until criticality is achieved. The shutdown margin of the core will ,

be detemined 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 asymetry check will be performed as part of a detailed statistical uncertainty evaluation of the TIP systen. A complete set of TIP data will be obtained at a steady state, equilibrium xenon condition greater 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 ,ystem and symetry of the core loading.

STUTEST - 2 f

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Proposed Startup Physics Tests for Cycle 4

1. Core Loading verification The core will be visually checked to verify confomance to the vendor supplied core loading pattern. Fuel assembly serial numbers, bundle orientations, and core locations will be recorded.

A height check will be perfomed to assure that all assemblies are properly seated in their respective locations.

2. Control Rod Functienal Testing Prior to criticality following the refueling outage, functional testing of the control rods will be perfomed to assure proper operability. This testing will include coupling verification, withdrawal and insertion timing, and friction testing where required. The subcriticality of the reloaded core with an individual control rod fully withdrawn will be verified by monitoring the nuclear instrur.entation.

J. Shutdown Margin Detemination Control rods will be withdrawn in their standard sequence until criticality is achieved. The shutdown margin of the core will ,

be detemined 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 centrol rod position.

4. Tip Asymetry A gross asyrrnetry check will be performed as part of a detailed statistical uncertainty evaluation of the TIP systen. A complete set of TIP data will be obtained at a steady state, equilibrium xenon condition greater 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 symetry of the core loading.

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