Quality Planning and ITPs

What a quality plan covers

A quality plan defines the quality activities applicable to a specific item, project, or work scope. At a minimum, it identifies the applicable quality requirements and standards, the inspections and tests to be performed and their sequence, the acceptance criteria for each activity, the responsible parties for performing and witnessing each activity, the hold and witness points, the documentation required as objective quality evidence, and any special qualifications required of personnel performing the work.

Quality plans are scope-specific. A quality plan for a weld repair on a safety-related pressure boundary is not interchangeable with one for a calibration activity or a software modification. The plan must reflect the specific characteristics of the work, the applicable codes, the acceptance criteria derived from the design basis, and the verification activities appropriate to the risk and complexity of the scope.

Quality plans must be reviewed and approved before work begins. Using a quality plan that has not been approved, or beginning work before the plan is in place, is a procedural violation equivalent to working without a procedure. In nuclear QA, the pre-job review of the quality plan, including confirmation that acceptance criteria are defined and personnel qualifications are current, is a fundamental discipline.

Inspection and test plans: structure and use

An inspection and test plan (ITP) is a tabular document, typically structured as a matrix, that maps each activity in a work scope to its verification requirements. Each row represents a discrete activity or process stage; the columns capture the activity description, the responsible party, the verification type, the acceptance criteria, the required documentation, and the hold or witness point designation.

The three standard ITP point types are defined as follows. A Hold point (H) is a mandatory stop: work cannot proceed past this point until the designated party has verified the activity, evaluated the results against the acceptance criteria, and formally released the hold in writing. Hold points are placed at irreversible process stages, critical measurement points, and any step where proceeding without verification would conceal or destroy the evidence needed to verify quality. A Witness point (W) requires notification to the designated party, who is invited to observe. Work may proceed if the party does not respond within the specified notification period, but a written waiver or notification record is required. A Review point (R) requires review of the documentation after the activity is complete, without requiring the reviewer to be present during execution.

Acceptance criteria: the technical foundation

Acceptance criteria define the specific, measurable standard against which a verification activity is evaluated. "Acceptable" or "meets specification" are not acceptance criteria. Acceptance criteria must reference specific values, ranges, tolerances, or attributes that can be objectively compared against a measurement or observation. For a dimensional inspection, the acceptance criterion is the drawing tolerance. For a pressure test, it is the test pressure and the acceptance condition (no leakage, pressure hold within tolerance). For a weld visual inspection, it is the specific surface condition requirements of the applicable code.

Acceptance criteria must be established before work begins and before the inspection is performed. Retroactively setting acceptance criteria after a measurement is taken to justify accepting an out-of-tolerance condition is a nonconformance. If an activity produces a result outside the pre-established acceptance criteria, the result is nonconforming and must be processed through the nonconformance program. An accept-as-is disposition on a nonconformance requires engineering evaluation and authorised sign-off — it cannot simply be written into the ITP after the fact.

Linking quality plans to work packages and travellers

A quality plan or ITP is most effective when it is integrated directly into the work package rather than maintained as a separate document that may or may not be consulted. Work travellers — the sequential instruction documents that guide field execution — should reference the ITP and carry the hold point sign-off blocks directly on the traveller page. This integration means that a worker following the traveller encounters the hold point as a mandatory step in the work sequence, not as a separate process that requires going to find the ITP.

The completed ITP, with all sign-offs, measurements, and acceptance confirmations recorded, is a quality record. It must be retained for the period specified in the QA program, typically the life of the installation for safety-related work. The ITP record is one of the first documents requested during NRC or CNSC inspections of completed work: it demonstrates that the quality activities were planned in advance, performed by qualified personnel, and evaluated against pre-established criteria.