Liquid Penetrant Testing (PT) Requirements Under NQA-1

Consumables are batch-controlled: certificates for each batch, contamination checks, and the sulphur and halogen limits where the material demands it. NQA-1, enforced by The American Society of Mechanical Engineers (standard owner and operator of the.: Employer-based.

An auditor examining PT asks for penetrant, developer, cleaner and emulsifier batch records, plus the light meters for the inspection environment. NQA-1 is the implementing standard that turns the eighteen abstract criteria of 10 CFR 50 Appendix B into auditable requirements. Part I contains the eighteen Requirements — Organization; Quality Assurance Program; Design Control; Procurement Document Control; Instructions, Procedures and Drawings; Document Control; Control of Purchased Items and Services; Identification and Control of Items; Control of Special Processes; Inspection; Test Control; Control of Measuring and Test Equipment; Handling, Storage and Shipping; Inspection, Test and Operating Status; Control of Nonconforming Items; Corrective Action; Quality Assurance Records; Audits. Part II adds supplemental subparts for specific activities, including Subpart 2.7 Software Control and Subpart 2.14 Commercial Grade Dedication. Requirement 9 covers special processes such as welding and NDE; Requirement 2 covers indoctrination, training and the qualification of inspection and test personnel. A graded approach lets the degree of application follow the quality level of the work.

Source: ASME NQA-1-2022, 'Quality Assurance Requirements for Nuclear Facility Applications' (ASME/ANSI listing); ASME NQA-1-2024 issued 24 July 2024 is the newest edition. NRC Regulatory Guide 1.28, Revision 6, 'Quality Assurance Program Criteria (Design and Construction),' issued September 2023 and announced in the Federal Register on 11 September 2023, endorses NQA-1-2017, NQA-1-2019 and NQA-1-2022 subject to exceptions and clarifications, extends endorsement to Part II, and also endorses NEI 14-05A Revision 1 (September 2020) for accreditation in lieu of commercial grade surveys for laboratory calibration and test services. Part I Requirement list and the Part II Subpart 2.7 and 2.14 titles cross-checked against an ASME/ANS Section technical overview presentation dated 21 January 2026 and ASME's own standard page. ASME NQA-1 Certification programme description and CA Connect process from asme.org. NOTE: the specific paragraph number within Requirement 2 that addresses NDE personnel could not be confirmed from the standard itself and is deliberately omitted. Accessed 21 Aug 2026.

Liquid Penetrant Testing under NQA-1 — procedure, personnel and evidence
Item	What applies	Why it matters
Regime	ASME NQA-1, Quality Assurance Requirements for Nuclear Facility Applications	Enforced by The American Society of Mechanical Engineers (standard owner and operator of the voluntary NQA-1 Certification programme); the U.S. Nuclear Regulatory Commission endorses it through Regulatory Guide 1.28, and the U.S. Department of Energy imposes it on its own contractors
Method	Liquid Penetrant Testing (PT)	Needs its own procedure and its own qualified personnel
Procedure approval	The employer's Level III, qualified in this method	The signature an auditor traces
Other methods in scope	UT, PAUT, RT, MT, VT, ET	Each needs separate qualification
Renewal	NQA-1 compliance itself does not expire; it is maintained continuously and verified by audit. NQA-1 Part I Requirement 18 requires audits to verify compliance with the programme, and in practice suppliers run internal audits of all requirements annually and are audited by customers on a recurring cycle — NUPIC's standard vendor schedule is 33 months. The ASME NQA-1 Quality Program Certificate is renewed by reassessment; ASME publishes a price guide covering both new certificates and renewals but does not publish the renewal interval on its programme pages, so it is not stated here.	Applies to the personnel certification behind this method

Does NQA-1 require a separate procedure for PT?

Yes. Every method in scope needs its own written procedure, approved by someone qualified in that method, describing technique, equipment, calibration, scanning or coverage, acceptance criteria and reporting. A single combined "NDT procedure" covering several methods is a finding under every regime that names procedures individually.

Who can approve a PT procedure under NQA-1?

A Level III qualified in PT. Because NQA-1 accepts employer-based certification, that Level III may be contracted rather than employed — but their own qualification must cover PT, and an auditor will check that before accepting the signature.

What PT records does a NQA-1 audit sample?

The approved procedure, the technician's PT certification on the date of work, and the equipment evidence — penetrant, developer, cleaner and emulsifier batch records, plus the light meters for the inspection environment. The auditor works backwards from a finished job, so every item has to reconcile with the report and its stated acceptance criteria.

What is the most common PT finding at audit?

Batch certificates missing for consumables used, or dwell time not recorded. It is a records failure rather than a technique failure — the examination was performed correctly and the evidence supporting it cannot be produced, which under NQA-1 is recorded the same way as not having done the work.

Can a technician certified elsewhere perform PT under NQA-1?

Not automatically. Employer-based certification ends when the holder leaves, so the new employer must certify them under its own written practice. Prior training and documented experience transfer as evidence; the certificate itself does not.

What equipment evidence does PT need under NQA-1?

Calibration status traceable to the day of use, covering the instrument and its accessories — probes, cables, blocks and reference standards for ultrasonics; sources and densitometers for radiography. An in-calibration instrument with an out-of-calibration reference block fails the same way as an uncalibrated one.

How do PT requirements differ from the other methods in NQA-1?

Scope, qualification and evidence are method-specific, so the differences are real rather than administrative. NQA-1 also covers UT, PAUT, RT, MT, VT, and each carries its own procedure, its own personnel qualification and its own equipment evidence.

Personnel certification for PT

Employer-based. NQA-1 does not certify individuals and does not operate a central scheme; Requirement 2 makes the supplier responsible for indoctrination, training and for qualifying inspection, examination and test personnel, and for NDE it points to the ASNT documents — ASNT Recommended Practice SNT-TC-1A or ANSI/ASNT CP-189 — implemented through the supplier's own written practice. That means an outsourced Level III can write and approve the written practice and the NDE procedures, administer and grade examinations, and sign as the certifying technical authority where the written practice designates them, while the employing supplier retains the certification decision and the records. ASME's NQA-1 certificate attests to the programme, not to any individual.