ML20210B262

Trip Rept of 721019 Visit to Plant to Investigate Ring Header Problem & Observe GE Blowdown Tests

ML20210B262
Person / Time
Site:	Quad Cities, 05000000
Issue date:	10/25/1972
From:	Chan S US ATOMIC ENERGY COMMISSION (AEC)
To:	Maccary R US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
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References
FOIA-87-40 NUDOCS 8705050275
Download: ML20210B262 (2)

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UNITED STATES 74 ,

ATOMIC ENERGY COMMISSION s W ASHINGTON. D.C. 20545

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hmie CCT 2 51972 R. R. ibecary, Assistant Director for Engineering Directorate of Licensing TRIP REPORT-QUAD-CITIES NUCLEAR POWER STATION UNIT 2 On October 19, 1972 a trip was made with J. I. Riesland of Operating Reactors Branch to the subject plant to investigate the ring header problem and to observe GE's blowdown tests. The following personnel have been contacted:

3. Stephenson, Assistant Plant Supt. , Commonwealth Edison E. Strickland, Test Coordinator, General Electric A. Levine, Licensing Engineer, General Electric Questions have been raised in the following areas:

1. Dynamic analysis of the torus-ring header system subjected to blowdown forces.

2. Tests for pressure distribution and wave propagation conducted by GE at plant site, including procedure, instrumenta tion, data reduction and input for structural analysis of the torus-ring header system.

3. State of stress and strain under various conditions such as dead weight, hydraulic force, thermal varia tions, earthquake, etc.

4. Fatigue problem of the torus-ring header system.

Since the GE test team a t plant site could not provide answers to analytical questions, a meeting will be arranged at a later date with GE engineers and concerned parties.

During one test invciving discharge of two relief valves, very vigorous dynamic response of the torus-ring header system has been

• observed. The hanger which links the ring header to the torus wall tends to push and pt.ll the torus wall violently through a thick 8705050275 FOIA 870428 PDR PDR THOMASe7-40

R. R. Maccary CCT 2 5 S72 circular pad, thus causing high repetitive and reversed bending stress on the torus at the edge of pads and at its welds. It is my opinion that the ring header should be supported by ground foundation instead of hangers Attached to the torus.

Sai P. Chan rL Mechanical Engineering Branch Directorate of Licensing cc: D. F. Lange, L J. I. Riesland, L J. P. Knight, L

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