ML023050102

Attachment 2, River Bend, RAI, Piping Evaluation

ML023050102
Person / Time
Site:	River Bend
Issue date:	07/15/2002
From:	Office of Nuclear Reactor Regulation
To:
Minns J
Shared Package
ML023050214	List: 2CAN090203, Attachment 10, Arkansas Nuclear One, Unit 2, Draft, Supplement to Amendment Request for TS Change Regarding Missed Surveillances Using the Consolidated Line Item Improvement Process ML023050102 ML023050106 ML023050107 ML023050110 ML023050112 ML023050119 ML023050123 ML023050127 ML023050134 ML023050169 ML023050176 ML023050180 ML023050184 ML023050189 ML023050192 ML023050200 ML023050208 ML023100131
References
Download: ML023050102 (1)

Text

ivc7 137/3 Ewo '771-/7,h7A1 5-o-L/5 REQUEST FOR ADDITIONAL INFORMATION r/i-,

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FOR ENTERGY OPERATIONS, INC.

RIVER BEND STATION, UNIT 1 DOCKET NO. 50-458 3.5 Piping Evaluation 3.5.1 Reactor Coolant Pressure Boundary Piping On page 3-5 of the GE Safety Analysis report, a table summarizes theevaluation of the piping inside containment. Piping for systems such'as main steam and feedwater

/:

include erosion/corrosion as a concern under power uprate c6nditions. However, the""

following systems do not include erosion/corrosion as a concern: the'recirculation, system, the RPV bottom head drain line, residual heat,removal, low pressure'core spray, high pressure core spray and RWCU. The staff -requests the licensedt6 provide information supporting the exclusion of erosion/corrosion for the above listed systems.

General Flow Accelerated Corrosion (FAC) Question';

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1. Since the effects of FAC on degradation of carbon steel components are plant-specific, the staff requests the licensee to provide a predictive' analysis methodology that must include the values of the parameters affecting FAC, su66h as velocity and temperature, and the corresponding changes in component wear rates of the systems most susceptible to FAC before and after the power uprate. Please include'predicted FAC* wear rate changes in balance of plant components and those comp**nents m6sbt susceptible to FAC.

2. The staff requests that the licenrsee indicate the degree of compliance with NRC Generic Letter 89-08; "Erosion/Corrosion in Piping>T.,Tis letter requires that an effective program be implemented to maintainm tructural integrity f h'igh-energy carbon steel systems. The licensee should describe how the licensee's current'program incorporates this guidance.

3. In Section 3.5.2, "Balance-6fZPlarntPiping Evaluation", the licensee states that the RBS erosion/corrosion program uses CHECWORKSTM. The staff requests the licensee to discuss

a.

'The licensee's meth'tdology for using CHECWORKSTM to monitor and inspect systems aiffecte*d by FAC.

The licensees plans for modifying CHECWORKS TM or other applicable FAC predictivei ieth6dologies to account for the power uprate.

c, Other pladnt systems such as feedwater, main steam and associated piping that use a generic computer code (e.g., CHECWORKS) for predicting wall thinning e "by FAC. If the code is plant-specific please provide its description.