ML091180721
| ML091180721 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 03/20/2009 |
| From: | - No Known Affiliation |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2009-0070 | |
| Download: ML091180721 (2) | |
Text
.-A IWA22
- GENERAL REQUIREMENTS IWA-2213 licensed to write boiler and pressure vessel insurance .once before initial use with an optical comparator (lOX in that Province; or greater) or other suitable. instrument to verify that (3) by an Inspector' employed by other enforce- the height of a representative lower case character, for ment authorities in the United States or Canada having the selected type size, meets the requirements of Table jurisdiction over the designated plant. IWA-2210-1. Remote examination may be substituted (b) The Authorized Inspection Agency, including its for direct examination. The remote examination pro-staff of. Authorized Nuclear Inservice Inspector Super- *cedure shall be demonstrated to resolve the selected test visors and the Inspectors, shall meet the requirements chart characters. Alternatives to the direct visual ex-of ASME N626. amination distance requirements of Section V may be (c) The Authorized Inspection Agency shall be ac- used as specified in Table IWA-2210-1. It is not nec, credited by ASME in- accordance, with the provisions essary to measure illumination levels on each exami-set forth in ASME(N626.' nation surface when the same .portable light, source or similar installed lighting equipment is demonstrated to provide the specified illumination at the maximum ex-IWA-2130 ACCESS FOR INSPECTOR amination distance. The illumination levels from bat-tery .powered portable lights shall be checked before The Owner shall arrange for an Inspector to have. and after each examination or.series of examinations, access to .all parts of the plant as necessary to make not to exceed 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> between checks.
the.required inspections. The Owner 'shall keep the In-spector informed of the. progress of the preparatory work necessary to permit inspections, and shall notify the Inspector. at a time reasonably in advance of when* IWA-2211 VT-1 Examination the components will be ready for inspection. VT-1 examinations are conducted. to detect discon-tinuities and'imperfections on the surfaces of compo-nents, including such conditions as cracks, wear, cor-IWA-2200 EXAMINATION METHODS rosion, or erosion.
(a) The three types of examinations used during in-service inspection are defined as .visual, surface, and volumetric. The examination method to be used is IWA-2212 VT-2 Examination specified in Tables IWB-, IWC-,. IWD-, IWE-, IWF-,
and IWL-2500-1.. If a component must be examined in* (a) VT-2 examinations are conducted to detect evi-a high radiation area, remotely controlled equipment dence of leakage from pressure retaining components, may be advisable. with or without leakage collection systems, as required (b) When. preparation of a surface for nondestructive during the conduct of system pressure test.
examination is required, the preparation shall be by a (b) VT-2 examinations shall be conducted in accor-mechanical method. Such surfaces shall be blended into. dance with 1WA-5000. For direct examination, the the surrounding area as may be required to perform the Table , IWA-2210-1 maximum examination distance examination. The wall thickness shall not be reduced shall apply to* the distance from the eye to the surfaces below the minimum thickness required by design. Non-" being examined.
mandatory Appendix D may be used -for such surface preparation. "
IWA-2213 VT-3 Examination VT-3 examinations are conducted to* determine the IWA-2210 VISUAL EXAMINATIONS general mechanical and structural condition of. com-Visual examinations shall be conducted in accor- ponents and their supports by verifying parameters such dance with Article 9 of Section V and the following. as clearances, settings, and physical displacements; and A written procedure and report of examination results to detect discontinuities and imperfections, such 'as loss is required. For procedure demonstration, a near-dis- of integrity, at bolted or welded connections, loose or tance vision test chart containing text .with lower case missing parts, debris, corrosion, wear, or erosion.
characters without an ascender or. descender (e.g., a, VT-3 includes examinations for conditions that could c, e, o) meeting Table IWA-2210-1 is required..Mea- affect operability or functional adequacy of snubbers surements of the near-distance test chart shall be made and constant load and spring type supports.
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4 IWA-5222 GENERAL REQUIREMENTS IWA-5245 defined by the system boundary (or each portion of the sentially horizontal surfaces of insulation *shall be ex-boundary) within which the components have the same amined at each insulation joint.
minimum required classification and are designed to the (b) When examining insulated components, the ex-same pressure rating as governed by the system func- amination of the surrounding area (including floor areas tion and the internal fluid operating conditions, re- or equipment surfaces located underneath the compo-spectively. nents) for evidence of leakage, or other areas to which (b) Systems which share safety functions for differ- such leakage may be channeled, shall be required.
ent modes of plant operation, and within which the (c) Discoloration or residue on surfaces examined component classifications differ, shall be subject to sep- shall be given particular attention to detect evidence of arate system hydrostatic tests of each portion of the boric acid accumulations from borated reactor coolant.
system boundary having the same minimum required leakage.
design pressure ratings.
(c) Systems designed to operate at different pres-IWA-5243 Components With Leakage Collection sures under several modes of plafit operation or post-Systems accident conditions shall be subject to a system hy-drostatic test within the test boundary defined by the Where leakages from components are normally ex-operating mode with the higher pressure. pected and collected (such as valve stems, pump seals, (d) Where the respective system design pressure rat- or vessel flange gaskets) the VT-2 Visual examination ings on the suction and discharge sides of system shall be conducted by verifying that the leakage col-pumps differ, the system hydrostatic test boundary shall lection system is operative.-
be divided into two separate boundaries (such as suc-tion side and discharge side test boundaries). In the IWA-5244 Buried Components case of positive displacement pumps, the boundary in-terface shall be considered as the pump. In the case (a) In nonredundant systems where the buried com-of centrifugal pumps, the boundary interface shall be ponents are. isolable by means of valves, the VT-2 vi-the first shutoff valve on the discharge side of the sual examination shall consist of a leakage test that pump. determines the rate of pressure loss.. Alternatively, the test may determine the change in flow between the ends of the buried components. The acceptable rate of pres-IWA-5240 VISUAL EXAMINATION sure loss or flow shall. be established by the Owner.
(b) In redundant systems where the buried compo-IWA-5241 Noninsulated Components nents are nonisolable, the VT-2 visual examination (a) The VT-2 visual examination shall be conducted shall consist of a test that determines the change in by examining the accessible external exposed surfaces flow between the ends of the buried components.. In of pressure retaining components. for evidence of leak- cases where an annulus surrounds the buried compo-age. nents, the .areas at each end of the buried. components (b) For components whose external surfaces are in- shall be visually examined for .evidence of leakage in accessible for direct VT-2 visual examination, only the lieu of a flow test.
examination of the surrounding area (including floor (c) In nonredundant systems where the buried com-areas or equipment surfaces located underneath the ponents are nonisolable, such as return lines to the heat components) for evidence of leakage shall be required. sink, the VT-2 visual examination shalI consist only of a verification that the flow during operation is not im-paired.
IWA-5242 Insulated Components (a) For systems borated for the. purpose of control-IWA-5245 Elevated Temperature Tests ling reactivity, insulation shall be removed from pres-sure retaining bolted connections for VT-2 visual ex- The visual examination of system components re-amination. For other components, a VT-2 visual quiring a test temperature above 200TF during the sys-examination may be conducted without the removal of tem pressure test may be conducted after the pressure insulation by examining the accessible and exposed sur- holding period of IWA-5213 is satisfied, and the pres-faces and joints of the insulation. Essentially vertical sure is lowered to the level corresponding with a tem-surfaces of insulation need only be examined at the perature of 200'F, in accordance with allowable cool-lowest elevation where leakage may be detectable. Es- down rates established by fracture prevention criteria.
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