Field Service Division

On-Site Testing
Services

Cardinal Nuclear Group's Field Service department is a national leader in Nuclear Air Treatment system testing. Our engineers have advised and tested at facilities across the United States and internationally, bringing precision, regulatory expertise, and deep industry knowledge to every engagement.

Core Testing Services

NRC / ASME / ASTM Standards

100%

Compliance Rate

◆Also serving international nuclear sites & clean-room environments

What We Do

Testing Disciplines

Each service is delivered by certified Field Test Engineers trained to ASME and NRC standards. We tailor our approach to your facility's specific configuration, regulatory status, and schedule.

01/hepa leak testing

HEPA Filter Leak Testing

Cardinal Nuclear Group performs HEPA filter leak testing to verify the integrity and performance of high-efficiency particulate air (HEPA) filtration systems in safety-related ventilation applications.

In-place HEPA filter leak testing (installed systems)

Aerosol challenge testing using approved agents (PAO/DOP alternatives)

Upstream/downstream scanning for leak detection

Housing, gasket, and seal integrity verification

Identification of filter defects, installation issues, or frame leakage

Full documentation per ASME N510, ASME AG-1, and site-specific QA procedures

02/charcoal bypass testing

Charcoal Bypass Leak Testing

Cardinal Nuclear Group performs charcoal bypass leak testing to verify the integrity and performance of activated carbon filtration systems used in safety-related ventilation systems.

In-place testing of charcoal adsorber banks

Verification of bypass leakage rates per regulatory limits

Injection and downstream detection methods (halogenated hydrocarbons or approved tracers)

Identification of seal failures, frame leakage, and media defects

Detailed reporting aligned with ASME N510 and ANSI/ASME N45.2

03/control room habitability

Control Room Habitability (CRH) Testing

Cardinal Nuclear Group provides Control Room Habitability (CRH) testing to confirm that control room environments remain safe and operable during accident conditions.

Tracer gas testing to evaluate control room envelope in-leakage

Pressurization verification and boundary integrity testing

Filtration system performance verification (HEPA + charcoal stages)

Emergency mode system validation under simulated conditions

Data collection and analysis aligned with 10 CFR 50 Appendix A and Regulatory Guide 1.197

04/airflow testing

Airflow Testing & Balancing

Cardinal Nuclear Group performs airflow testing and system balancing to ensure proper ventilation performance across safety-related and non-safety HVAC systems.

Airflow measurement (CFM) across ducts, diffusers, and equipment

System balancing to achieve required flow distribution

Differential pressure verification between critical zones

Smoke studies and flow visualization (as required)

Fan and system performance verification

Integration with nuclear QA programs under ASME NQA-1

05/pressure mapping

Pressure Mapping

When zones need to be maintained at a certain pressure with respect to adjacent areas, we employ two methods: the absolute pressure method and the relative pressure method.

Relative pressure method using PD-C Pressure Detector

Measures differential pressure between zones

Ideal for large zones or rapidly changing pressures

Absolute pressure method using multiple absolute pressure gauges

Best for simpler zones or where portable equipment is not feasible

Compliance

Regulatory Standards

Based on the requirements of NRC Regulatory Guides 1.52 and 1.140, all testing is performed in strict compliance with applicable ASME and ASTM standards.

Acceptance Testing

Acceptance Testing must be performed in accordance with ASME Standards N510 and AG-1, Section TA. This testing validates new installations meet all design specifications and regulatory requirements.

ASME N510AG-1 Section TA

In-Place Testing

In-Place Testing must be performed in accordance with ASME N510 or N511. This periodic testing ensures continued system performance and compliance throughout the facility lifecycle.

ASME N510ASME N511

Applicable Standards

NRC RG 1.52

ESF Air Treatment

NRC RG 1.140

Non-Safety Air Treatment

ASME N509

Nuclear Air Design

ASME N510

Testing Procedures

ASME N511

In-Service Testing

ASME AG-1

Nuclear Equipment

ASTM E741

Air Change Rate

ASTM E2029

Duct Flow

How It Works

HEPA Filtration Testing

Our testing verifies the integrity and leak-tight performance of installed HEPA filtration systems, ensuring nuclear air treatment components meet defined acceptance criteria and QA-controlled testing requirements.

≤0.01%

Acceptance Criteria

0.3μm

Particle Size Tested