ML25318A035
| ML25318A035 | |
| Person / Time | |
|---|---|
| Site: | 07103080 |
| Issue date: | 10/20/2025 |
| From: | Dokters-Gladisch W, Rakers J Advanced Nuclear Fuels GmbH, Lingen, Framatome |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards, US Dept of Transportation, Pipeline & Hazardous Materials Safety Admin |
| References | |
| Download: ML25318A035 (1) | |
Text
Advanced Nuclear Fuels GmbH Postfach 14 65 - 49784 Lingen - Deutschland - Hausadresse: Am Seitenkanal 1 - 49811 Lingen - Telefon +49 (0) 591 91450 Vorsitzender des Aufsichtsrats: Carsten Haferkamp - Geschftsführer: Andreas Hoff Sitz Lingen - Amtsgericht Osnabrück, HRB 100028 - Umsatzsteuer-ID: DE 117330474 Ein Unternehmen von Framatome Seite 1 von 2 Advanced Nuclear Fuels GmbH - Postfach 14 65 - 49784 Lingen Advanced Nuclear Fuels GmbH US Department of Transportation Pipeline and Hazardous Materials Safety Administration Associate Administrator for Hazardous Materials Safety (PHH-31) 1200 New Jersey Ave SE, Washington, DC 20590-0001 Name William Dokters-Gladisch Abteilung Department LPT Tel./Durchwahl Tel./Extension
+49 (0) 591/9145-224 Fax
+49 (0) 591/9145-288 E-Mail William.dokters-gladisch
@framatome.com Ihr Schreiben Your letter Enclosure RAIs Model No. ANF-50 Unsere Zeichen Contact May 7, 2025_TJT:25:008 Datum/Date 20.October 2025 Application for Revalidation of German Competent Authority Certificate D/4365/AF-96 for Model No. ANF-50 Transport Package: NRC's Request for More Information.
Dear Sir or Madam,
We hereby refer to the comments provided in the enclosure titled RAIs_Model No. ANF-50.
a Question:
Inspection equipment requirements (e.g., lighting and visual acuity requirements for performing visual exams) to ensure reliable inspections that can adequately detect and characterize indications of localized aging effects prior to component failure or loss of safety function.
Answer:
For reliable visual inspections, adequate and uniform lighting as well as suitable auxiliary equipment (e.g., flexible light sources, endoscopes) are provided to enable the inspection of even hard-to-reach areas. The inspector must have proven visual acuity, which is regularly confirmed by vision tests. The requirements for equipment and personnel qualification are specified in the Ageing Surveillance Programme (AÜP) and in the management system (see Chapters 5, 7.5, and 8 AÜP).
b Question:
Acceptance criteria for aging effects (e.g., early-stage fatigue cracks, localized corrosion of stainless-steel components, chloride induced stress corrosion cracking (SCC), pitting, and crevice corrosion). Examples of visual indications that may indicate potential localized corrosion of stainless-steel components include the accumulation of atmospheric deposits such as salts, buildup of corrosion products, rust-colored stains or deposits, and surface discontinuities or flaws associated with pitting, crevice corrosion, and/or SCC.
Brief vom/letter of:
- 20. September 2025 Betreff/subject:
ANF-50 unser Zeichen/contact: May 7, 2025_TJT:25:008 Advanced Nuclear Fuels GmbH Seite 2 von 2 Answer:
No visible cracks, pitting, crevice corrosion, or corrosion products are permitted.
Surfaces must be free from material loss. Typical visual indications of localized corrosion include deposits, discoloration or surface irregularities. The acceptance criteria and inspection intervals are defined in Tables 4 and 5 of the Ageing Surveillance Programme (AÜP) (see Chapters 3.1, 7.4, and 8 AÜP).
c Question:
Surface cleaning requirements implemented to ensure that bare metal visual inspections of component surfaces are capable of detecting surface flaws, and for ensuring adequate removal of atmospheric deposits such as salts or other chemical compounds that may contribute to localized corrosion of stainless-steel components.
Answer:
Before each visual inspection, surfaces must be cleaned mechanically (e.g., with soft cloths) and/or chemically (e.g., with distilled water, mild detergents, or isopropanol) to remove deposits such as salts or other corrosive substances. The cleaning process must be documented and is a prerequisite for effective defect detection (see Chapters 7.4.1.5, 8 AÜP, 10).
d Question: Flaw evaluation methods (such as flaw sizing and flaw analysis methods) and associated flaw acceptance criteria that be used to determine whether components containing flaws are acceptable for continued service.
Answer:
Detected defects are documented with respect to their size and location and, if necessary, further evaluated using additional non-destructive testing methods (e.g.,
ultrasonic testing, dye penetrant testing). Superficial, non-progressive, and non-safety-relevant defects may be accepted. Progressive damage such as cracks or deep pitting is not permissible. The decision regarding continued use is made by a qualified expert in accordance with the requirements of the Ageing Surveillance Programme (AÜP) and the Bundesanstalt für Materialforschung und -prüfung (Federal Institute for Materials Research and Testing, BAM) guidelines (see Chapters 5, 7.5, 8 AÜP, 10).
Best regards Advanced Nuclear Fuels GmbH i.V. J. Rakers i.V. W. Dokters-Gladisch Digital unterschrieben von DOKTERS-GLADISCH William Datum: 2025.10.20 10:34:33
+02'00' RAKERS Joerg Digital unterschrieben von RAKERS Joerg Datum: 2025.10.20 11:17:06 +02'00'