ML20210K922

Reliability & Support Configuration

ML20210K922
Person / Time
Site:	Crystal River
Issue date:	04/24/1986
From:	FLORIDA POWER CORP.
To:
Shared Package
ML20210K894	List: 3F0486-13, Forwards License Change Request 44 to License DPR-72,adding Condition That Design & Licensing Basis of Reactor Coolant Pump Supports Need Not Include Consideration of Effects of Postulated Pipe Ruptures ML20210K905 ML20210K922
References
NUDOCS 8604290119
Download: ML20210K922 (6)

Text

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1 ATTACHMENT C RELIABILITY AND SUPPORT CONFIGURATION CRYSTAL RIVER 3 GENERATING PLANT Prepared By FLORIDA POWER CORPORATION

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RC PUMD SUPDORT CONFIGURATION Preseni Octimi zed Quantity 32 Snubbers (8/ pump) 4 Snubbers (~1/ pump) 4 Rigid Struts Size 18" to 25" Bore Nax. 14" Bore Capacity 1000 Kip to 2000 Kip 400 Kip ODTIMIZED COMPONENT RELIABILITY Snubbers

. Integral Reservoir (Pressurized)

. More Radiation Resistant Fluid *

. Longer Seal Service Life

. Improved Contrcl Valve Performance / Reliability

. Test-in-Place Capability Link Bars / Struts

. One-Time Installation

. Only Requires Visual Inspection large Comoonent Suecorts

. Acceptaoie R.v. anc OTSG Margins ,

SYSTEM RELIABILITY

. Overall Flexibility of Piping System Increased

. Lower stress during thermal expansion of system - heat-up/ cool down.

(vs. present configuration if snubbers were assumed to fail in locked-up/rigic condition)

. Higher seismic stress (low probability of occurrence)

. Suf fici ent design ma rgins retained for piping and large component i supports.

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