ML060950606

GALL AMP: XI.M28, Buried Piping and Tanks Surveillance (Audit Worksheet GALL Report AMP)

ML060950606
Person / Time
Site:	Vermont Yankee
Issue date:	03/22/2006
From:	Morgan M NRC/NRR/ADRO/DLR/RLRC
To:	Office of Nuclear Reactor Regulation
morgan M NRR/NRC/DLR/RLRC, 415-2232
Shared Package
ML060950189	List: ML060950195 ML060950215 ML060950218 ML060950220 ML060950224 ML060950235 ML060950250 ML060950258 ML060950262 ML060950269 ML060950271 ML060950277 ML060950279 ML060950284 ML060950290 ML060950301 ML060950311 ML060950323 ML060950328 ML060950331 ML060950347 ML060950351 ML060950356 ML060950364 ML060950370 ML060950372 ML060950375 ML060950540 ML060950549 ML060950559 ML060950567 ML060950570 ML060950573 ML060950579 ML060950582 ML060950587 ML060950596 ML060950606 ML060950610 ML060950620 ML060950624 ML060950629 ML060950632 ML060950634 ML060950637 ML060950645 ML061000078 ML061000090 ML061000096 ML061000101 ... further results
References
%dam200611, TAC MC9668
Download: ML060950606 (5)

Text

AUDIT WORKSHEET GALL REPORT AMP PLANT: ______________________________

LRA AMP: __________________________ REVIEWER: ______________________

GALL AMP: XI.M28, Buried Piping and Tanks Surveillance DATE: __________________________

Program Auditable GALL Criteria Documentation of Audit Finding Element Program A. The program includes surveillance and preventive measures Consistent with GALL AMP: Yes No Description to mitigate corrosion by protecting the external surface of buried Document(s) used to confirm Criteria:

carbon steel piping and tanks. Surveillance and preventive measures are in accordance with standard industry practice, based on National Association of Corrosion Engineers (NACE)

Standards RP-0285-95 and RP-0169-96, and include external Comment:

coatings, wrappings, and cathodic protection systems.

1. Scope of A. The program relies on preventive measures, such as coating, Consistent with GALL AMP: Yes No Program wrapping, and cathodic protection, and surveillance, based on Document(s) used to confirm Criteria:

NACE Standard RP-0285-95 and NACE Standard RP-0169-96, to manage the effects of corrosion on the intended function of buried tanks and piping, respectively.

Comment

2. Preventive A. In accordance with industry practice, underground piping and Consistent with GALL AMP: Yes No Actions tanks are coated during installation with a protective coating Document(s) used to confirm Criteria:

system, such as coal tar enamel with a fiberglass wrap and a kraft paper outer wrap, a polyolifin tape coating, or a fusion bonded epoxy coating to protect the piping from contacting the aggressive soil environment. Comment:

B. A cathodic protection system is used to mitigate corrosion Consistent with GALL AMP: Yes No where pinholes in the coating allow the piping or components to Document(s) used to confirm Criteria:

be in contact with the aggressive soil environment. The cathodic protection imposes a current from an anode onto the pipe or tank to stop corrosion from occurring at defects in the coating.

XI.M28 Buried Piping And Tanks Surveillance 1

Program Auditable GALL Criteria Documentation of Audit Finding Element Comment:

3. Parameters A. The effectiveness of the coatings and cathodic protection Consistent with GALL AMP: Yes No Monitored/ system, per standard industry practice, is determined by Document(s) used to confirm Criteria:

Inspected measuring coating conductance, by surveying pipe-to-soil potential, and by conducting bell hole examinations to visually examine the condition of the coating.

Comment:

4. Detection of A. Coatings and wrapping can be damaged during installation or Consistent with GALL AMP: Yes No Aging Effects while in service and the cathodic protection system is relied Document(s) used to confirm Criteria:

upon to avoid any corrosion at the damaged locations.

Degradation of the coatings and wrapping during service will result in the requirement for more current from the cathodic protection rectifier in order to maintain the proper cathodic Comment:

protect potentials. Any increase in current requirements is an indication of coating and wrapping degradation. A close interval pipe-to-soil potential survey can be used to locate the locations where degradation has occurred.

5. Monitoring A. Monitoring the coating conductance versus time or the Consistent with GALL AMP: Yes No and Trending current requirement versus time provides an indication of the Document(s) used to confirm Criteria:

condition of the coating and cathodic protection system when compared to predetermined values.

Comment:

6. Acceptance A. In accordance with accepted industry practice, per Consistent with GALL AMP: Yes No Criteria NACE Standard RP-0285-95 and NACE Standard RP-0169-96, Document(s) used to confirm Criteria:

the assessment of the condition of the coating and cathodic protection system is to be conducted on an annual basis and compared to predetermined values.

Comment:

7. Corrective A. The site corrective actions program, quality assurance (QA) Consistent with GALL AMP: Yes No Actions procedures, site review and approval process, and Document(s) used to confirm Criteria:

administrative controls are implemented in accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in XI.M28 Buried Piping And Tanks Surveillance 2

Program Auditable GALL Criteria Documentation of Audit Finding Element the appendix to this report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the Comment:

corrective actions, confirmation process, and administrative controls.

8. A. See Item 7, above. Consistent with GALL AMP: Yes No Confirmation Document(s) used to confirm Criteria:

Process Comment:

9. A. See Item 7, above. Consistent with GALL AMP: Yes No Administrative Document(s) used to confirm Criteria:

Controls Comment:

10. Operating A. Corrosion pits from the outside diameter have been Consistent with GALL AMP: Yes No Experience discovered in buried piping with far less than 60 years of Document(s) used to confirm Criteria:

operation. Buried pipe that is coated and cathodically protected is unaffected after 60 years of service. Accordingly, operating experience from application of the NACE standards on non-nuclear systems demonstrates the effectiveness of this Comment:

program.

XI.M28 Buried Piping And Tanks Surveillance 3

EXCEPTIONS Item Program Elements LRA Exception Description Basis for Accepting Exception Documents Reviewed Number (Identifier, Para.# and/or Page #)

1.

2.

ENHANCEMENTS Item Program Elements LRA Enhancement Description Basis for Accepting Enhancement Documents Reviewed Number (Identifier, Para.# and/or Page #)

1.

2.

DOCUMENT REVIEWED DURING AUDIT Document Number Identifier (number) Title Revision and/or Date 1.

2.

3.

4.

XI.M28 Buried Piping And Tanks Surveillance 4