ANS CNP case studies

ANS CNP · Put your knowledge to work in context.

The Certified Nuclear Professional (CNP) credential, administered by the American Nuclear Society, is a professional certification intended for individuals working across the nuclear enterprise - reactor operations, engineering, safety analysis, radiation protection, fuel cycle, security, and regulatory affairs. It signals that a candidate has demonstrated broad, integrated knowledge of nuclear science and its applied practice rather than depth in a single specialty. The ANS CNP case studies are 5 cases and about 2,774 words.

Shutdown Margin Erosion After a Rod Worth Measurement

You are the shift supervisor on a small PWR at the end of a fuel cycle. The core is at hot zero power, all control rods fully withdrawn except the regulating bank, which sits at 220 steps.

563 words, about 3 min 2

Dose Constraint Conflict During a Steam Generator Tube Inspection

A two-unit PWR has one unit in a refueling outage. During eddy-current inspection of steam generator tubes, a through-wall indication is found on a tube in the hot leg.

562 words, about 3 min 3

Criticality Safety Question at a Fuel Fabrication Facility

You are the criticality safety engineer at a fuel fabrication plant handling low-enriched uranium (LEU) oxide powder. A process line uses 5-liter stainless steel vessels.

582 words, about 3 min 4

Safeguards Discrepancy in a Spent Fuel Pool Inventory

You are the material control and accounting (MC&A) officer at a research reactor facility. During a semi-annual physical inventory, the measured inventory of spent fuel assemblies in the pool is 2 assemblies short of the book inventory.

527 words, about 3 min 5

Source-Term Assumption in a Design-Basis Accident Analysis

You are a licensing engineer reviewing a design-basis accident analysis for a small modular reactor. The applicant's safety analysis report uses a source term for a loss-of-coolant accident that assumes 100% of the volatile fission product inventory in the fuel-cladding gap is released, but assumes only 1% release from the fuel matrix for the same isotopes.

540 words, about 3 min