project profile bwr main condenser retubing ... complete retubing of bwr main condenser during...

PROJECT PROFILE BWR Main Condenser Retubing ... Complete retubing of BWR Main Condenser during refueling
Download PROJECT PROFILE BWR Main Condenser Retubing ... Complete retubing of BWR Main Condenser during refueling

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  • Project Scope Complete retubing of BWR Main Condenser during refueling outage. In addition to condenser retubing, Williams performed all scaffolding work and built a conveyor system to support transport of materials into work area.

    Project Description Williams managed the overall project execution including materials, equipment, tools, labor, and supervision.

    The project included:

    • Replacement of 36,860 admiralty brass and titanium main condenser tubes and retubing

    • Rigging, removal and replacement of the four inlet waterboxes including new inlet circulating water expansion joints

    • Removal and reinstallation of electrical, mechanical and structural interferences to facilitate tube replacement

    • Repair of stem-side impingement protection and baffles; installation of tube bundle protection items

    • Fabrication of rail transportation system for tubes

    Challenges • 10’ x 10’ Condenser bay egress was limited to access way.

    • Large increase in quantity of stakes required. Once project commenced, an additional 42,000 stakes needed attention for a total of 72,000 stakes.

    • Oversized hole issues. Tube sheets were found in bad condition.

    • Large volume of scope increase.

    • Contamination issues.

    • Limited RP support.

    Project Highlights Williams was able to complete the project in just 39 days—5 days ahead of schedule—by implementing innovative scheduling, execution and activity re-sequencing. The U.S. record for similar scope projects prior to this outage was 56 days. Throughout the course of the project, Williams faced changes to the scope and plant delays which delayed the schedule by an additional 50 hours. Using Acumen Risk schedule modeling, Williams was able to overcome these challenges. We developed 3-point estimates for every critical path activity, established a risk register and tied the risks to the activities they affected before running the analysis. Using this technique is very unique to this industry and was a major contributor to our predictability.

    PROJECT PROFILE

    100 Crescent Centre Parkway, Suite 1240 | Tucker, GA 30084 USA | office: 770.879.4400 | www.wisgrp.com

    BWR Main Condenser Retubing

    Client: Entergy

    Location: FitzPatrick Nuclear Power Plant

    Project Duration: October 2014 (39 days)

    Project Value: approx. $20M

    Contract Method: Firm Fixed Price

    Fish screen replacement

    Tube sheet on the inlet side

    Conveyor build by Williams going into LSA box

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