ML20039A067
| ML20039A067 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/01/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8112160191 | |
| Download: ML20039A067 (2) | |
Text
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Dune -POWER COMPANY: 10 p
. Powsu Duu. nmo 422 Sourn Cnuncu SrazzT, CHAHWTTE, N. C. 28242 '
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- 4 '7 WILLIAM O. PARKER,JR.
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TELLPuou t:AmeA 704 Strau PaoDuctum >
373-4083 October ~1, 1981-'
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Mr. James' P. O'Reilly, Director 6fjl 7
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4 U.!S. Nuclear Regulatory Commission 4
. Region.II
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101 Marietta Street, Suite 3100 2
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Atlanta,= Georgia 30303 i
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.Re: RII:PKV
.A Ng l_hc 50-413/81-08 Ni 50-414/81-08
Dear Mr. O'Reilly:
The following is a revised response transmitting the results of an engineering evaluation conducted in regard to Violation 413-414/81-08-03, which.was identified in the above referenced Inspection Report.
Flow orifice plates have been and will continue to be installed in accordance.
with Construction Quality Assurance Proce'dures M-4, M-55, and M-49.
Procedure
,M-4 applies to Class A, B, and C pipe and references. Construction. Quality
-Assurance Procedure M-24 for cleanliness. Procedure M-55 applies to Class E pipe and refererices Construction Procedure CP-50 which in turn references Procedure M-24 for cleanliness. Procedure M-49 applies to Class'F pipe and-references Procedure M-24 for cleanliness. Procedure M-24 describes the cleanness acceptance criteria in which a quality control inspector _ visually.
inspects:the internal' surface of items being joined. _ By Section 6.2 of Pro-cedure M-24 carbon steel surfaces must meet the folicwing requirement:
iThin uniform rust films are acceptable..The'following types are not acceptable:
- 1.
Hard rust (rust which forms in a crusty film and tends to break off in flakes or pieces.)
2.
Heavy rust ( a continuous film of appreciable thickness which forms due to lengthy exposure to aerated' water'or condensed moisture.)
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'Since all flow sections at Catawba Nuclear Station have been installed in'
-l accordance with Construction Procedure M-24,'any rust degradation on.the j
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carbon steel flow sections.would be of the-thin uniform rust. film type.
The accuracy.. efforts of a thin layer of rust were discussed with various
, flow meter vendors.. All agree that the upstream and downstream sections
. essentially maintained their smoothness and are not affected by.a thin layer.
8112160191 811001 PDR ADOCK 05000413' i
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Mr.fJames F. O'Reilly, Director October-1, 1981 Page 2 of-rust.
The error resulting from rust would not exceed one-half.of,a percent of total flow and is acceptable for adequate system performance. Therefore, the effects of rust degradation on installed sections are minimal and will not
' alter the acceptability of the eensurements.
I declare under penalty of perjury, that the statements set forth hecein are true and correct to the best of my knowledge.
Ve y truly yours,.
/
LA,
William O. Parker, Jr.
RWO/php cc: NRC Rsident Inspector Catawba Nuclear Station O
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