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Nuclear

Nuclear Industry Overview

Nuclear Power is our future and MLEA Inc. has always maintained a very strong presence in the Nuclear Power Industry. MLEA Inc. is focused on solving complex technical problems for nuclear utilities. Our principal engineers average more than 25 years of nuclear plant engineering and operations experience. Below is a list of some of our recent projects.

Spent Fuel Pool Decay Heat Management

MLEA Inc. recently designed and supported the installation of an Alternate Decay Heat Removal (ADHR) system at the Cooper Nuclear Station in Brownville, Nebraska. The ADHR system more than doubled the heat removal capacity of the existing spent fuel cooling at Cooper and provides additional capacity for (1) early fuel movement during outages (2) early outage maintenance of normal cooling systems and (3) back-up capacity for unexpected events or postulated accidents. [Continue Article]

New Reactor Licensing

Through a subcontract with NUMARK Associates of Washington, DC, MLEA Inc. is providing technical evaluations of licensing submittals for the New Reactor Office of the US Nuclear Regulatory Commission. Under the NUMARK contract, MLEA Inc. engineers are reviewing technical submittals for the design certification of the U.S. EPR (Evolutionary Power Reactor) by AREVA, along with combined license applications for planned EPR units such as Calvert Cliffs 3 and Calloway. MLEA Inc. engineers compare the design certification or combined license applications against federal regulations and related regulatory guidance (including appropriate industry standards or topical reports) and prepare technical evaluation reports for the NRC Staff. MLEA Inc. engineers determine whether or not the applications meet the regulatory requirements and provide conclusions and recommendations to the NRC Staff as appropriate. The ultimate product of this work are NRC safety-evaluation reports which accept or reject the applications based on regulatory requirements.

Extended Power Uprate (EPU)

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Point Beach:

MLEA Inc. is providing mechanical design support for EPU including the review of calculations, Tech Specs, Operating Procedures, EOPs and determining testing requirements in preparation for an integrated test program.

Hope Creek:

MLEA Inc. has provided extensive mechanical design support for EPU including the revision of almost 100 calculations, Tech Specs, Operating Procedures, EOPs and the development of the test plan.

Susquehanna:

MLEA Inc. has provided mechanical design support for EPU including the revision of fuel pool calculations and onsite support.

Design Support

MLEA Inc. engineers supported the PSEG Nuclear design project to install a closed loop cooling water system for Salem Units 1 & 2 containment cooling system. This system replaces the service water supply, reduces diesel loading, and enhances reliability. MLEA Inc. engineers are responsible for all calculations and specifications for the project as well as preparing the UFSAR changes.

Licensing Support

MLEA Inc. engineers excel at solving complex problems at nuclear utilities, recent issues resolved at the Salem and Hope Creek Generating Stations are:

• Resolution of degraded and nonconforming conditions - CO2 Fire Suppression Systems Switchgear Rooms and Lower Electrical Penetration Areas
• Calculation to demonstrate the ability of the RHR shutdown-cooling mode to achieve cold shutdown (reactor outlet temperature below 200°F) within 24 hours using only one RHR heat exchanger and one SACS loop
• Calculations to document the effects on the Service Water System from the automatic response of plant systems to a LOCA (loss-of coolant accident), LOOP (loss of offsite power), LOCA & LOOP or LOCA & single vital bus undervoltage

SSFI

MLEA Inc. engineers conducted Safety System Functional Inspections (SSFI) of:

• Diesel Generator and Emergency AC Distribution for Peach Bottom Atomic Power Station
• Emergency Service Water and RHR Service Water for Limerick Generation Station
• 125 Vdc Distribution system for the James A. FitzPatrick Nuclear Power Plant
• Main Steam system for the Indian Point 3 plant

Design Basis

MLEA Inc. engineers supported the response to the USNRC "Request for Information Pursuant to 10CFR50.54(f) Regarding Adequacy of Design Bases Information" for PSE&G's Salem I & II and Hope Creek Generation Stations and NYPA's James A. FitzPatrick Nuclear Power Plant.

MLEA Inc. engineers are providing guidance and oversight for Hope Creek Generation Station Design Basis Document (DBD) Project.

Response Team Support

MLEA Inc. provided Response Team support for the PSE&G-sponsored Hope Creek Operational Performance Inspection of the Service Water and Safety Auxiliaries Cooling System.

MLEA Inc. assisted the PSE&G Response Team in support of the USNRC-sponsored SSFI of the Salem Component Cooling Water System. Significant issues resolved included CCW Pump runout, single failure of a room cooler and Emergency Diesel Generator Loading.

MLEA Inc. assisted the NYPA Response Team in support of the USNRC-sponsored SSFI of the Indian Point 3 Service Water System.

FSAR

MLEA Inc. engineers led the Salem FSAR Project. The FSAR project integrated a series of new initiatives with several recently completed or ongoing Salem improvement programs related to the plant licensing and design basis. The new initiatives implemented by the FSAR Project included UFSAR reviews, accident analysis input and assumption validations and vertical slice reviews.

FMEA

MLEA Inc. identified several scenarios where adverse interactions could occur among safety systems due to design modifications or plant conditions at Crystal River 3. Postulated failures of DC control circuits were common precursors to these scenarios. MLEA Inc. performed Failure Modes and Effects Analysis (FMEA) to systematically identify other scenarios. MLEA Inc. developed the FMEA methodology, coordinated electrical evaluations and assisted in the evaluation of system and plant effects.

50.59

MLEA Inc. engineers prepared and reviewed numerous 10CFR50.59 Safety Evaluations for Salem, Hope Creek and James A. FitzPatrick.

MLEA Inc. designed and supplied a containment closure device that serves as an atmospheric ventilation barrier to be installed during refueling outages at nuclear power stations. The containment closure device provides for rapid isolation to restrict radioactive material released from the containment during a postulated refueling accident. The design allows for equipment access to the containment building that normally would not be allowed until later in the refueling outage after all the fuel has been removed from the reactor vessel. This device provides outage scheduling flexibility that can save considerable time in returning stations to service when planning major equipment outages such as steam generator replacements.