XI-1-83-54Rt XI-1-86-21R Section XI - Interpretations No. 26

Interpretation: XI-1 -83-541

Subject: Section XI, Division 1, IWA-4400, IWA-4600, and IWA-7400; Hydrostatic Testing (I 977 Edition and Later Editions and Addenda Through the 1987 Addenda)

Date Issued: September 19, 1989

File: BC84-321*

Question: If the Owner performs a pipe replacement in accordance with Section XI, Division 1, IWA-7000, what hydrotesting is required?

Reply: The hydrostatic test requirements of IWA-4600 shall be met, except for the items listed under IWA-7400 and IWA-4400.

Interpretation: XI-1 -86-21 R

Subject: Section XI, Division 1, Table IWB-2500-1, IWP and I W V ; Defect Removal Without Welding (1977 Edition With Addenda Through Summer 1978, and Subsequent Ad- denda Through Winter 1985)

Date Issued: September 19, 1989

File: IN86-004*

Question (I): When maintenance is performed which does not involve welding or does not involve metal removal, do the requirements of-Section XI apply?

Reply (I): No; however, Table IWB-2500-1 applies.

Question (2): When maintenance such as removal and reinstallation of the same bolting ma- terial, tightening of fasteners, and replacement of gaskets, packing, and seals, where such mainte- nance does not require welding or removal or replacement of pressure retaining material, do the rules of Section XI apply?

Reply (2): No, except for the retest requirements of I W V and IWP.

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Section XI - Interpretations No. .26 X1-1-86-27Rt XI-1 -116-52R

Interpretation: XI-1 -86-27R

Subject: Section XI, Division 1, IWA-5214, IWC/lWD-4000, and IWC/IWD-7000; Pressure Testing After Disassembly and Reassembly of Class 2 and 3 Mechanical Joints (I 980 Edition With Addenda Through Winter 1981)

Date Issued: September 19, -1 989

File: lN86-007"

Question: Does Section XI, Division 1, IWA-5214(e) apply to the disassembly and reassembly of mechanical joints in Class 2 and 3 systems only when such is performed in the course of a Section XI, Division 1, IWC-4000 and IWD-4000 repair or. IWC-7000 and IWD-7000 replacement?

Reply: Yes.

Interpretation: Xi-1 -86-52R

Subject: Section XI, Division 1, IWA-3400, IWB-3000, IWB-3500, IWX-2500 and Table I W X - 2500-1; Flaw Evaluations and Indications (1980 Edition With Addenda Through Winter 1981 1

Date Issued: November 22, 1989

File: BC85-524*

Question (1): In accordance with Section XI, Division I, may -linear flaws addressed in IWA- .3400, and linear indications detected by surface examinations required by IWB-3500, be defined in accordance with Section I l l , 1980 Edition with Addenda through Winter 1981, NX-5341 (c) and NX- 5351 (c)?

Reply (1): No, The acceptance criteria shall be as stated in IWB-3500.

Question (2): In accordance with Section XI, Division 1, are nonlinear indications detected by surface examinations specified in IWX-2500 which exceed the acceptance criteria specified h t h e Construction Code unacceptable, unless found acceptable by subsequent volumetric examinations?

Reply (2): IWX-2500 requires that components be examined and tested as specified in Table IWX-2500-1. If the indication exceeds the acceptance standards of IWB-3000, it is classified as a flaw. The flaw must be either analyzed to the requirements of IWB-3600 or repaired. For preservice examinations, analysis is not permitted.

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Section XI - Interpretations No. 29 XI-1-86-13R, XI-1-89-46R

Interpretation: XI-1-86-13R

Subject: Section XI, IWA-5211, IWA-5214, IWA-4000, and IWA-7000; System Pressure Tests - Disassembly and Reassembly

Date Issued: June 10, 1991

File: BC85-111*

Question (1): In Section XI (1983 Edition), IWA-5214 is titled “Repairs and Replacements.” Does this paragraph apply only to activities conducted under the IWX-4000, “Repair Procedures” (except IWP), and IWX-7000, “Replacements” articles in other than Class 1 systems?

Reply (1): Yes.

Question (2): When using Section XI, (1977 Edition with Addenda through Summer 1978, and later Editions and Addenda through the 1983 Edition), is a system pressure test (IWA-5000) re- quired whenever the pressure boundary is opened and closed (e.g., replacing a valve bonnet gasket)?

Reply (2): No. A Section XI pressure test is required only when the pressure boundary is opened and closed in the course of a Section XI repair or replacement, with the exception of those items exempt under JWA-4000/7000, (see Interpretation XI-1-89-08).

Interpretation: XI-1-89-46R

Subject: Section XI, IWA-7210; Section VI11 as The Construction Code Edition)

Date Issued: April 15, 1991

File: IN90-008*

Edition of (1989

Question (1): Does Section XI, IWA-7210, allow the installation of existing pressure vessels constructed in accordance with other than the current Edition and Addenda of Section VI11 for use in a nuclear power plant application?

Reply (1): Yes.

Question (2): Does Section XI, IWA-7210, allow the construction of a Section VI11 pressure vessel to other than the current Section VI11 Edition and Addenda when used in a nuclear power plant application?

Reply (2): Section XI requires the Section VI11 requirements to be met.

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