ML12089A622
| ML12089A622 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 04/09/2010 |
| From: | American Society of Mechanical Engineers (ASME) |
| To: | Atomic Safety and Licensing Board Panel |
| SECY RAS | |
| Shared Package | |
| ML12089617 | List: |
| References | |
| RAS 22134, 50-247-LR, 50-286-LR, ASLBP 07-858-03-LR-BD01 | |
| Download: ML12089A622 (2) | |
Text
CASE N-776 CASES OF ASME BOILER AND PRESSURE VE.."lSEL CODE Approval Date: April 9, 2010 Code Cases will remain available for use until annulled by the applicable Standards Committee.
Case N-776 Alternative to IWA-S244 Requirements for Buried Piping Section XI, Division 1 Inquiry: What alternative to the requirement of IWA-5244 may be used for examination of buried compo nents?
Reply: It is the opinion of the Committee that the follow ing may be used as an altf~rnative to the requirements of IWA-5244 for examination of buried components.
(a) For buried components surrounded by an annulus, the VT-2 visual examination shall consist of an examina tion for evidence of leakage at each end of the annulus and at low point drains.
(b) For buried components without an annulus, the fol
. lowing examination requirements shall be met:
(I) A VT-2 visual examination shall be perfonned to identify evidence of leakage on ground surfaces in the vicinity of the buried components and in areas where leak age might be channeled or accumulated. The examination shall be perfonned after the component has been pressur ized to system leakage test pressure for at least 24 hr.
Portions of buried components where a VT -2 examination is impractical (e.g., component is buried beneath imperme able material or encased in concrete) are exempt from VT-2 examination.
(2) A test that detennines the rate of pressure loss, a test that determines the change in flow between the ends of the buried components, or a test that confirms that flow during operation is not impaired shall be performed. Per sonnel performing these tests need not be qualified for VT-2 visual examination.
(3) The Owner shall specify criteria for the examina tions and tests of (b)(I) and (b)(2).
The Committee's function is to establish rules of safety. relating only to pressure integrity. governing the construction of boilers, pressure vesselsf transport tanks and nuclear components. and inservic::6 inspection for pressure integrity of nuclear components and transport tanks, and to interprat these rules when questions arise regarding their lntent. This Code does not address other safety issues relating to the construction of boilers, pressure vessels. transport tanks and nuclear components, and the inservice inspection of nuclear compononts and transport tanks, The user of the Code should refer to other pertinent codes. standards. laws, regulations or other relevant documents, 1 (N-776)
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