I. Define the Scope of the Work

A. Description

The purpose of this project is to assemble the PHENIX FVTX detector in preparation for its installation in the PHENIX experiment in Building 1008. The detector uses silicon strip sensors, built by Hamamatsu, which have been placed on a substrate (with digitizing electronics) by SiDet at Fermilab. We will take these finished sensor/substrates, called "wedges", and assemble them into a detector system. Additional read-out-cards (ROCs) will be installed with the wedges in a mechanical cage; the mechanical structure and ROCs will be built elsewhere and delivered to BNL for assembly in these labs. There is an ORTEC 4-channel 1000 V low-current bias supply for use with the silicon sensors. Typical applied voltages will be around 100 V. Standard coaxial cable, with SHV and SMA connectors, will be used. The rooms will not operate as "clean rooms" but some clean room equipment will be used to limit contamination; masks for the nose and mouth, gloves, a sticky pad at the door, and an air filter for Room 2-91. None of these pose any safety hazards. Each room will have a dry box for storage of the silicon sensors. The dry box will be connected to bottles of dry air using standard pressurized air-handling equipment.  At most two bottles will reside in each room, attached to standard bottle racks. The assembly and testing will make use of standard laboratory tools (screwdrivers, wrenches, etc.) and test equipment (CAT III multimeters, oscilloscopes, computers and interface boards, etc.) which pose no hazards.

The coolant Novec 7200 (made by 3M) will be used to cool the wedges during testing. Some information from the manufacturer's description of this fluid: "Novec 7200 is nonflammable and does not exhibit flammability characteristics under normal operating and storage conditions. This fluid is highly resistant to thermal breakdown and hydrolysis in storage and during use. Recommended handling procedures are provided in the pertinent Material Safety Data Sheet. The toxicological testing completed on Novec 7200 fluid shows the overall toxicity is low. The material is minimally irritating to the eyes, non-irritating to the skin and is not a mutagen. This material is rated “practically non-toxic” through inhalation. A twenty-eight day inhalation study has helped establish a recommended exposure guideline of 200 ppm for an eight-hour average worker exposure per day." A product information sheet and MSDS for Novec 7200 are included in this ESR submission.

A water-cooled chiller will be used to cool the Novec 7200.  The water used will be discharged into the drain.  In order to minimize water used in this way, the chiller will only be used when needed and will not be left running overnight or unattended.

A sealed 330uCi  Sr-90 source (BNL ID# 200898)  will be used to test the detector modules in lab 2-91. The source is housed in a metal collimator to minimize exposure to personnel

Equipment manuals or procedures that are controlled documents:

None.

B. Human Performance Factors

The greatest source of stored energy in the lab that could hurt someone will be the pressurized bottles of dry air. Standard bottle-handling procedures will be used to prevent injury. The greatest danger to the project is damage to the silicon sensors during the assembly. The use of an air filter, the entry-way sticky pad, gloves and masks should mitigate the risk of damage. In the beginning there will need to be some learning about how to safely handle the "wedges" and we will need to develop protocols and techniques to prevent damage.

C. Waste Minimization/Pollution Prevention

This project does not routinely generate hazardous waste. Whenever new materials or processes are introduced, their impact on the waste stream is considered. Low hazard materials are used wherever possible.

D. Materials Used /Waste Generated

II. Identify and Analyze Hazards Associated with the Work

Physical Hazards:

• Compressed gases (lecture bottles, cylinders, gas lines)
(Areas: 0510-FIRST-1-116, 0510-SECOND-2-91)
• Soldering of electronic components
• Low-current high-voltage power supplies (Other)

Chemical Hazards:

• None

Ionizing and Non-ionizing Radiation Hazards:

• Sealed radioactive sources (SRS) –not accountable

Biological Hazards:

• None

Offsite Work:

• None

Other Issues (Security, Notifications, Community, etc.):

• None

Significant Environmental Aspects

• Any use of once-through cooling water with a flow of 4 gpm – 24 hrs/day (10 gpm – 8 hrs/day, daily use of >15 gpm for >60 days) and discharging to the sanitary sewer

III. Develop and Implement Hazard Controls and Assess Risk

H. Recommended Exposure Monitoring

• None

I. EPHA Determination

IV. Perform Work Within Controls

• Hazard Communication (HP-IND-200)
• Radiological Worker I (TQ-RW1-PART1)
• Compressed Gas Safety (TQ-COMPGAS1)

B. Personnel Training, Qualification, and Authorization List

C. Emergency Procedures
None

D. Transportation
None

E. Notifications
None

F. Termination/Decommissioning

When the project is completed, the equipment will be released for other uses and the rooms returned to the Department in acceptable condition.

V. Provide Feedback

VI. Attachments