Safety & Compliance

ISOCTA maintains a comprehensive safety management system covering all aspects of Institute operations. This page provides a summary of the principal safety programmes. Full policy documentation is available on the Safety intranet.

Safety Policy

The Institute is committed to maintaining a safe working environment for all personnel, contractors, and authorised visitors. The Executive Director holds ultimate responsibility for safety governance, with day-to-day oversight delegated to the Institute Safety Committee, which meets monthly.

The full safety policy statement is available at: ISOCTA Safety Policy (rev. 2003-06).

Radiation Safety

[IMAGE: Instructor in lab coat holding a handheld radiation survey meter in front of a small group in a classroom setting]

Figure 1: Radiation safety training session in Building 7. Institute health physicist demonstrating the use of a portable scintillation survey meter. (Photograph from the 2002 annual refresher course.)

The Institute operates a Radiation Safety Programme in compliance with applicable regulations and international standards. The programme covers:

Sealed sources used for instrument calibration and non-destructive testing (NDT) in Buildings 1, 4, and 6. All sources are registered, subject to six-monthly wipe testing, and stored in approved shielded containers when not in use.
X-ray generating equipment including XRD and XRF analytical instruments in Building 4. These are interlocked and operated under a standing local rules protocol.
Neutron-generating equipment — the Institute holds a single ²⁵²Cf calibration source (nominal activity 3.7×10⁷ n/s at date of manufacture) and a deuterium-tritium sealed-tube neutron generator (14 MeV, maximum output 1×10⁸ n/s pulsed) used for materials characterisation and detector development. Both are housed in Building 4 in a dedicated shielded enclosure with interlocked access control. [Operating procedures]
Personal dosimetry — all personnel with access to controlled radiation areas (including Building 6) are issued with thermoluminescent dosimeter (TLD) badges processed quarterly by an accredited external service. Aggregate occupational exposure data are reviewed annually by the Institute health physicist. [2003 summary (restricted)]
Environmental monitoring — continuous air sampling and effluent monitoring is conducted at designated locations across the campus. Results are compiled in an annual environmental report. [2002 environmental report (restricted)]

Controlled Radiation Areas

The following areas are designated as Controlled Radiation Areas under ISOCTA Safety Rule SR-7:

Building 4 — Neutron source enclosure and adjacent preparation laboratory
Building 4 — X-ray diffractometer room
Building 6 — High-bay hall and operating gallery (during specific operations)
Building 6 — Heater array vault (during maintenance activities)

Entry requires active dosimeter and completion of site-specific safety induction module S6 or S4 as applicable.

Laser Safety

The Institute operates numerous Class 3B and Class 4 laser systems across Buildings 1, 3, and 4. All laser laboratories are fitted with interlocked door controls, laser-rated protective eyewear stations, and illuminated warning signs in accordance with IEC 60825. The Laser Safety Officer maintains a register of all laser systems and conducts annual compliance audits. [Laser register (restricted)]

Cryogenic Safety

The cryogenics facility in Building 2 handles liquid helium (LHe) and liquid nitrogen (LN₂) in significant quantities. The building is equipped with oxygen depletion monitors, forced ventilation, and pressure relief systems on all cryogenic vessels. The Institute's helium liquefier (rated capacity 35 L/hr) is operated by certified personnel under a standing operating procedure. [Cryogenic safety procedures]

Electrical Safety

The campus 11 kV distribution network, substations, and high-power electrical systems (including the Building 6 heater arrays and pulsed-power supplies in Building 4) are subject to a structured electrical safety programme. Only authorised electrical personnel may access switchgear, transformer enclosures, and high-voltage equipment areas. The Institute electrical duty holder maintains the Electrical Safety Rules and the site single-line diagram.

Chemical & Materials Safety

Chemical inventory management, Safety Data Sheet (SDS) maintenance, and hazardous waste disposal are coordinated through the Institute chemical safety officer. Particular attention is given to:

Solvents and photoresists used in cleanroom processing (Building 1)
Cryogenic fluids and compressed gases (Buildings 2, 4)
Acids and etchants for materials preparation (Building 4)
Refractory metal powders for vacuum arc processing (Building 4)

Emergency Preparedness

The Institute maintains a site-wide emergency response plan covering fire, chemical spill, cryogenic release, electrical incident, and radiological incident scenarios. Annual evacuation drills are conducted in coordination with local emergency services. The emergency assembly point is located at the south-east corner of the main courtyard.

Emergency contact numbers and procedures are posted in every laboratory and on the emergency procedures intranet page.

Safety Performance

Year	Lost-Time Incidents	Reportable Events	Near-Miss Reports
2003 (to Oct)	0	1 ^†	7
2002	0	0	5
2001	0	1 ^‡	4
2000	1	2	6

^† Unplanned steam release from Building 6 secondary loop pressure relief valve (no injuries). Root cause: control system setpoint drift. Corrected.
^‡ Minor cryogenic burn (Building 2) during LHe transfer. Operator error; additional training implemented.