HVAC Engineer
DeNuke - Ohio

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We are in need of three HVAC Engineers to support our projects.
10 years HVAC design, repair, modification.

HVAC Engineer with design and field installation and start-up experience.
HVAC control systems experience, with emphasis on nuclear facilities.

DeNuke has multiple concerns with the Heating, Ventilation, and Air Conditioning (HVAC) systems that support the Conversion Building, which consists of the following: Office/Control Room Area, Lab Area, Condensing Room, Hot Shop, Powder Transfer Room, Vaporization Room, and Conversion Room. The HVAC system is a partially once pass through and partially recirculation system with the air NOT conditioned before entering the facility and has been previously balanced by a Subcontractor. A Technical Report studying the HVAC system was conducted in 2011 highlighting the concerns. A copy of the technical report is included in the attachments.

Scope of Work

Operational experience over the past 24 months has indicated the need to resolve the following
HVAC system shortcomings: •

Temperature and humidity control in the Control Room has been less than adequate, due to a poorly functioning system and high heat loads from video screens and servers. •
Humidity control in the Conversion area at all levels, primarily during periods when Conversion Units are not operating, has contributed to excess moisture in the CUs leading to difficult system start up. •
Temperature and humidity control in the Hot Shop area is not controlled properly, leading to poor work conditions and condensation dripping from overhead cooling water lines. •
Water damage to electrical components has occurred due to rain water leaking into the HVAC unit on HV unit 3 •
Improper installation of HVAC control systems in some areas (e.g. second floor office areas and control room)

This Scope of Work comprises a complete technical analysis of the above issues as well as those presented in the 2011 preliminary study. Work elements shall include: •

Review of systems, design documents, previous HVAC study and field walk down with
BWCS Engineering personnel. •
Develop conceptual approaches (may need alternatives for more difficult issues) to resolve the above short comings and other observed issues with ROM cost estimates for resolution. •
For recommended modifications to systems credited in the Documented Safety Analysis (DSA), consideration must be given to follow up actions (e.g. upgrading control logic, re- balancing the system for differential pressure control, etc). •
Where significant inadequate or improper installation of equipment or control systems is identified, estimates are to be developed for field work necessary to rectify those observations.

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