RT Level 1 Course — Radiographic Testing Level I Training
RT Level I requires 40 hours of formal training and 210 hours of radiographic experience under SNT-TC-1A, certified by your employer through written and practical exams. But method certification alone does not let you handle radiation sources: US industrial radiography also requires a separate radiation-safety qualification under 10 CFR Part 34, typically an IRRSP card plus licensee exams. You need both tracks.
| Method | Radiographic Testing (RT) |
|---|---|
| Level | Level I |
| Scheme | ASNT SNT-TC-1A (employer-based) |
| Prerequisites | High-school education or equivalent; annual near-vision (Jaeger J-2) and colour-contrast check |
| Training hours | 40 h classroom + 210 h on-the-job experience — SNT-TC-1A recommended minimums from our training requirements matrix; your written practice sets the binding figures |
| Delivery | Live online · Onsite at your facility |
| Practical exam | Administered by an ASNT Level III under your written practice |
| Practice | Practical NDT simulator (practice only — not a substitute for the practical exam) |
| Instructor | Anoop Rayavarapu, ASNT NDT Level III |
Request a course quote — no published prices; quote within one business day.
Radiography is the only mainstream NDT method with two independent qualification tracks, and conflating them is the most common mistake entry candidates make. The SNT-TC-1A track — 40 training hours, 210 method hours, general/specific/practical exams — qualifies you in the testing method: exposure technique, film handling, image quality. The regulatory track under NRC 10 CFR Part 34 (mirrored by Agreement State rules) governs who may operate gamma and X-ray sources: certification through a recognized certifying entity such as ASNT's IRRSP program, licensee-administered radiation safety exams, mandated dosimetry, and the two-person rule at temporary job sites. A new RT Level I typically works as a radiographer's assistant under direct supervision while completing both tracks. Method fundamentals are covered at /radiographic-testing-training, the cross-method entry picture at /ndt-level-1-training, and hour comparisons at /blog/ndt-training-hours-requirements-by-method.
Source: ASNT SNT-TC-1A (2020), Table 6.3.1A; US NRC 10 CFR Part 34 — Licenses for Industrial Radiography and Radiation Safety Requirements
| Element | Method track — SNT-TC-1A | Radiation safety track — 10 CFR Part 34 |
|---|---|---|
| What it qualifies | Competence in radiographic testing technique | Legal authority to use radiographic exposure devices |
| Training | 40 hours formal RT training (Level I) | Radiation safety training per licensee program, plus certifying-entity exam |
| Experience | 210 hours RT method experience | Documented on-the-job training under a qualified radiographer |
| Who certifies | Employer's NDT Level III | Certifying entity (e.g., ASNT IRRSP) + licensee written and practical exams |
| Monitoring | Not addressed | Direct-reading dosimeter, alarming ratemeter, and film badge/OSL — all three, per 10 CFR 34.47 |
| Field rule | Supervision by Level II/III | Two qualified individuals present at temporary job sites (10 CFR 34.41) |
| Renewal | Recertification at ≤5-year intervals | Annual refresher training, audits, and periodic re-examination per license |
Two tracks, both mandatory — the structure nobody explains first
US industrial radiography splits qualification into two independent tracks, and every entry-level plan should be built around that fact. The method track follows SNT-TC-1A: 40 hours of formal training, 210 hours of documented RT experience, and employer-administered exams covering radiographic technique. The regulatory track follows 10 CFR Part 34, the NRC's industrial radiography rule (mirrored in Agreement States): radiation-safety certification through a recognized certifying entity such as ASNT's IRRSP program, plus your employer-licensee's own written exam, practical exam, and documented on-the-job training. The method track makes you competent; the regulatory track makes you legal. Job-ready means both, and they can — and should — run in parallel.
The SNT-TC-1A numbers for RT Level I
Table 6.3.1A recommends 40 hours of formal training and 210 hours of method experience for RT Level I, inside roughly 400 total NDT hours — the same hour class as UT and ET, and for the same reason: radiography is technically dense. As with all SNT-TC-1A programs, your employer's written practice fixes the binding figures and its Level III administers general, specific, and practical exams at a recommended 80 percent composite. Candidates with two years of engineering or science study may qualify for reduced classroom hours. Direct-to-Level II certification is permitted by summing both levels' hours — 80 training, 840 experience — as documented at /blog/ndt-training-hours-requirements-by-method.
What a RT Level I may do on a crew
Within the method, a Level I performs specific setups, exposures, and film processing per written instruction under Level II or III supervision — no interpretation, no acceptance decisions, no report signing. Layer the radiation rules on top and the practical entry role becomes radiographer's assistant: working physically alongside a qualified radiographer, setting up shots, handling film, placing image quality indicators, and running darkroom or CR processing, while every source operation happens under direct personal supervision as 10 CFR Part 34 requires. Crews at temporary job sites must include at least two qualified individuals under 10 CFR 34.41, which is precisely why the assistant role exists as the industry's paid apprenticeship.
Inside the 40 hours: what RT training covers
The Level I curriculum divides into radiation physics and imaging technique. Physics covers X-ray and gamma production, isotope characteristics — Ir-192 and Se-75 dominate field work — the inverse square law, half-value layers, and attenuation. Technique covers exposure calculations, source-to-film distance and geometric unsharpness, film speed and screen selection, density fundamentals, and image quality indicators (penetrameters). Darkroom chemistry and film artifacts still get real hours because film remains standard in US pipeline and pressure-vessel work, with computed and digital radiography folded in as employers modernize. Expect exposure-calculation math throughout — inverse square and decay problems are Level I exam staples.
The radiation-safety track in detail
Under 10 CFR 34.43, before independently operating exposure devices a radiographer must be certified in radiation safety by a certifying entity — ASNT's IRRSP exam is the standard route, offered for gamma, X-ray, or combined — and must pass the licensee's own written and practical examinations, backed by documented hands-on training. Working radiographers carry three monitoring devices simultaneously per 10 CFR 34.47: a direct-reading pocket dosimeter, an alarming ratemeter, and a processed dosimeter (film badge, OSL, or TLD). Annual refresher training, internal audits, and the 5 rem/year occupational dose limit under Part 20 frame ongoing compliance. None of this appears in your SNT-TC-1A method exams — it is a parallel system with its own records.
Exams and vision requirements
The method track requires SNT-TC-1A's three exams — closed-book general on RT fundamentals, specific on employer procedures and code exposure requirements, and a practical demonstrating setup, exposure, and processing on real samples. The regulatory track adds the certifying-entity exam plus licensee exams focused entirely on safety: emergency procedures, survey techniques, posting and barricading. Vision follows the standard SNT-TC-1A regime — annual near-vision at Jaeger No. 2 or equivalent from not less than 12 inches, and color-contrast differentiation at certification and at intervals not exceeding five years. Good near vision matters operationally even at Level I: reading dosimeters, densitometers, and IQI placement is daily work.
Where RT Level I jobs are and what employers screen for
Pipeline construction is the volume employer — girth-weld radiography to API 1104 across every US pipeline spread — followed by pressure vessel and piping fabrication to ASME Section V, structural work, and castings. Postings for entry radiography roles read differently from other methods: employers screen for the radiation-safety track first, asking for an IRRSP card or eligibility, clean dosimetry history, driver's license for source-transport vehicles, and willingness to travel. Method certification progress matters second. Candidates who arrive with the 40-hour RT course and a scheduled IRRSP exam move to the front of the line, because the employer can put them to productive assistant work immediately.
Pay at RT Level I and the trajectory upward
Radiography assistants start modestly, but the trajectory is steep because the two-track barrier constrains supply: BLS puts the all-levels median for nondestructive testing specialists at $78,350 (May 2025), and pipeline radiographers with full qualifications routinely out-earn peers in other methods once per-diem and overtime stack on travel work. ZipRecruiter's NDT Level 2 band of $48,000–$90,000 brackets what the next certification step unlocks. The economics favor finishing both tracks quickly — every month as a half-qualified assistant is a month at the bottom of the scale. Full method and industry pay bands are maintained at /blog/ndt-salary-guide-2026-global.
Building your RT program with Atlantis
Atlantis NDT delivers 40-hour RT Level I training aligned to the ASNT body of knowledge, with exposure-calculation drills and practical film work built in, plus exam preparation for the IRRSP radiation-safety credential. For employers, our ASNT Level III consultants develop written practices that correctly separate the method and regulatory tracks, administer qualification exams, and structure assistant-to-radiographer progressions that survive both NDT audits and radiation-safety inspections. Affordable, accessible, fully customizable. Start with the method overview at /radiographic-testing-training and the entry-level landscape at /ndt-level-1-training, then request a quote for individual training or a complete crew qualification program.
Does RT Level I certification let me operate a gamma camera?
No. Method certification under SNT-TC-1A does not confer source-handling authority. Operating exposure devices requires the separate radiation-safety qualification under 10 CFR Part 34 or Agreement State equivalents — until then you assist under a qualified radiographer's direct supervision.
What is an IRRSP card?
The Industrial Radiography Radiation Safety Personnel credential, administered by ASNT as an NRC-recognized certifying entity. Passing its radiation-safety exam — gamma, X-ray, or both — satisfies the certifying-entity requirement of 10 CFR 34.43, alongside your licensee's own training and exams.
How long does RT Level I take from a standing start?
The 40-hour course takes a week; the 210 method hours take roughly two to three months of full-time work. The radiation-safety track runs in parallel — most new hires work as radiographer's assistants and complete both tracks inside four to six months.
Can RT Level I read radiographs?
No. A Level I exposes film and processes it per written instruction but has no interpretation authority. Film and digital image evaluation against code acceptance criteria is the defining Level II function — see /rt-level-2-training for that requirement stack.
Is the radiation-safety training the same in every state?
The framework is uniform — NRC rules or Agreement State programs that must be compatible with them — but licensing details, reciprocity filings, and card formats vary by state. Your employer's radiation safety officer manages state-specific requirements; your IRRSP exam is recognized nationally.
What dose limits apply to industrial radiographers?
The federal occupational limit is 5 rem (50 mSv) total effective dose equivalent per year under 10 CFR Part 20, with licensees required to keep exposures as low as reasonably achievable. Your three monitoring devices exist to prove compliance continuously.