SECTION III, DIVISIONS 1 AND 2

Transcription

1 SECTION III, DIVISIONS 1 AND 2 Subject Interpretation File No. Division 1, Code Case N-792, Fatigue Evaluations Including Environmental Effects....III R * Division 1, NB-1130, Boundaries of Jurisdiction....III Division 1, NB-1140 and NB-2121 (2007 Edition With the 2008 Addenda)....III Division 1, NB/NC/ND-2121(c) and NB/NC/ND-2124 (2011 Addenda)....III Division 1, NB/NC/ND-5521 (2011 Addenda)....III Division 1, NC-3218, Upper Limits of Test Pressure....III Division 1, NC/ND-4424, Surfaces of Welds....III Division 1, NC-7511, Set Pressure Limitations....III Division 1, NCA-3811(a), Limitation Imposed on Approved Suppliers....III Division 1, NCA-3855 and NB III Division 1, NCA , Utilization of Unqualified Source Material....III Division 1, NCA III Division 1, NCA , Control of Measuring and Test Equipment....III Division 1, NF-2121, Permitted Material Specifications....III Division 2, CC-5520, Inspection of Welds (1998 Edition)....III

2 Interpretation: III R Subject: Division 1, Code Case N-792, Fatigue Evaluations Including Environmental Effects File No.: * Question (1): Does Code Case N-792 provide a procedure that may be used in combination with NB (e) to satisfy the requirement of NCA-1130 to account for the effect for the light water reactor environment on the fatigue life of a component? Reply (1): Yes. Question (2): Is the use of Code Case N-792 mandatory? Reply (2): No. Question (3): Does Code Case N-792 permit the cumulative fatigue usage factor to exceed 1.0 when the fatigue analysis accounts for the effect of the light water reactor environment? Reply (3): No. Interpretation: III Subject: Division 1, NC-7511, Set Pressure Limitations File No.: Question: Are the relief valve set pressure limitations, as defined in NC-7511, applicable to relief valves that are installed for over-pressurization protection in isolated/inoperable piping systems for the purpose of protecting the system when pressurization beyond the design pressure of the system could occur due to high pressure in-leakage from a valve that isolates the system from a higher pressure system? Reply: Yes.

3 Interpretation: III Subject: Division 1, NC-3218, Upper Limits of Test Pressure File No.: Question: Does the Code provide stress limits for hydrostatic testing of Classes 2 and 3 piping? Interpretation: III Subject: Division 1, NF-2121, Permitted Material Specifications File No.: Question: In NF-2121(b), is shim material exempt from the requirements of Article NF-2000, when the shim material is welded to the support and designed primarily for compressive loading, provided the other requirements of NF-2121(b) (requirements in the Design Specification, not subject to injury from service fluid, etc.) are met? Reply: Yes, provided that the requirements of NF-4000 are met.

4 Interpretation: III Subject: Division 1, NCA-3855 and NB-2430 File No.: Question (1): May a Certificate Holder or a Material Organization approve a manufacturer of welding wire as an approved supplier of qualified source material with a limited-scope program [NCA-3811(b)] in accordance with NCA (b)(1)? Reply (1): Yes. Question (2): If the Certificate Holder or Material Organization purchases welding wire as an unqualified source material, do the provisions of NCA apply? Reply (2): Yes. Question (3): For Section III, Divisions 1 and 3 construction, a Certificate Holder purchases a heat of welding wire that was made by a manufacturer meeting the requirements of Question (1) and performs the tests required by NB/NC/ND/NE/NF/NG-2430 using that wire and a lot of flux. The wire and flux are identified as required by NB/NC/ND/NE/NF/NG Does this test allow production welding using all coils of wire and bags of flux that are marked with the same identification as were used to weld the test coupons? Reply (3): Yes. Interpretation: III Subject: Division 1, NCA , Utilization of Unqualified Source Material File No.: Question: Do the requirements of NCA (a)(3)(a) through (e) apply to material for which certificates of compliance are acceptable?

5 Interpretation: III Subject: Division 1, NC/ND-4424, Surfaces of Welds File No.: Question: Is a counterbore mandatory for a weld joint that meets the fitting and aligning requirements of NC/ND and the surface condition requirements of NC/ND-4424? Interpretation: III Subject: Division 1, NCA , Control of Measuring and Test Equipment File No.: Question: Do the rules of NCA apply to measuring equipment used by personnel who are not responsible for the verification or acceptance of items? Interpretation: III Subject: Division 1, NB-1130, Boundaries of Jurisdiction File No.: Question: Is weld buildup on a nozzle end face of a Class 1 component considered part of the nozzle rather than the piping? Reply: Yes. See NB-1132(a).

6 Interpretation: III Subject: Division 1, NB-1140 and NB-2121 (2007 Edition With the 2008 Addenda) File No.: Question: Does the Code restrict the use of mechanical and electrical penetration assemblies to (Class MC) containment vessels only? Interpretation: III Subject: Division 1, NCA-3811(a), Limitation Imposed on Approved Suppliers File No.: Question: Does NCA-3811(a) prohibit approved suppliers from qualifying other suppliers of source materials? Reply: Yes. Refer to the NCA-9200 definition of approved supplier. Interpretation: III Subject: Division 1, NCA File No.: Question: Is it a requirement of NCA that the implementation of the Quality System Program begins at the point where the polyethylene source material has been produced? Reply: Yes.

7 Interpretation: III Subject: Division 1, NB/NC/ND-5521 (2011 Addenda) File No.: Question: Do NB-5521(a), NC-5521(a), and ND-5521(a) allow an ASNT Central Certification Program (ACCP) certificate as proof of having met the General, Specific, and Practical exam requirements for Level II and for Level III, Basic, Method, Specific (Procedure Preparation), and Demonstration exam (the performance demonstration practical exam)? Interpretation: III Subject: Division 1, NB/NC/ND-2121(c) and NB/NC/ND-2124 (2011 Addenda) File No.: Question (1): Do the provisions of NB/NC/ND-2124 permit material outside of the NPS 4 size limit for bar, such as in SA-182/SA-182M by reference to SA-234/SA-234M and SA-961, to be used for valve parts such as valve bonnets and discs (plugs)? Reply (1): No. Question (2): May material that is used under the provisions of NB/NC/ND-2121 be of specifications other than those in Section II, Part A or Part B? Reply (2): Yes, provided all the requirements of NB/NC/ND-2121 are met.

8 Interpretation: III Subject: Division 2, CC-5520, Inspection of Welds (1998 Edition) File No.: Question (1): Is it the intent of CC-3841, CC-5521, and Fig. CC to require permanent structural attachment welds fillet welded to the containment liner or thickened liner plate of a reactor containment to be classified Category H? Reply (1): Yes. Question (2): Is it the intent of CC-3841, CC-5521, and Fig. CC to require all Category H welds connecting permanent structural attachments to the thickened liner plate to be examined by PT or MT regardless of their weld dimensions? Reply (2): No. Only Category H permanent structural attachment welds to the liner or thickened liner plate that are partial penetration welds having a groove depth or throat dimensions greater than 1 in. (25 mm) or fillet welds with throat dimensions of 0.5 in. (13 mm) or greater are required to be examined by the liquid penetrant or magnetic particle method for the full length of the weld. In addition, all Category H full penetration welds are required to be examined by the magnetic particle or ultrasonic method.