Steam Generator Group Project: Annual report, 1985

Technical Report · Wed Apr 01 04:00:00 EST 1987

OSTI ID:6799157

Kurtz, R J; Lewis, M; Clark, R A

This report is a summary of the Steam Generator Group Project progress for 1985. Statistical analyses are presented of data from nondestructive examination (NDE) round robin tests that were performed on the Surry generator in 1984. In the first round robin, teams acquired and analyzed their own data on a selected 10% subset of tubes. In the second round robin, analysts from each participating team analyzed identical sets of data which were provided to them by the Project. Results from several examinations utilizing advanced/alternate NDE technologies including alternate eddy current probes and techniques, ultrasonics, and profilometry are also reported. Criteria are listed for selecting tube specimens that will be removed from the generator. A sampling plan based on these criteria is detailed graphically in the report. The initial steps that have been taken to carry out the plan are described; tooling fabricated for the sample removals is discussed. Successful removal of three 9-tube sections of tube sheet is described along with observations that were made of the sludge and the included tube sections. Preliminary results from destructive analysis of one section are reported. Further characterization of damage to tube support plates as observed from the secondary side is provided. During the report period validation activities were initiated by metallurgical evaluation of two tubes pulled from the hot leg tube sheet. Results from destructive measurement of maximum defect depth from these two tubes indicated that in-situ bobbin coil NDE measurements consistently undersized the defects.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA); Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering Safety
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6799157
• Report Number(s): NUREG/CR-4848; PNL-5771; ON: TI87008168
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ACOUSTIC TESTING
BOILERS
CHEMICAL REACTIONS
CHEMISTRY
CRACKING
DECOMMISSIONING
DECOMPOSITION
EDDY CURRENT TESTING
ELECTROMAGNETIC TESTING
ELECTRON MICROSCOPY
ENRICHED URANIUM REACTORS
MATERIALS TESTING
METALLOGRAPHY
MICROSCOPY
NONDESTRUCTIVE TESTING
POWER REACTORS
PWR TYPE REACTORS
PYROLYSIS
REACTORS
REPAIR
SCANNING ELECTRON MICROSCOPY
SLUDGES
SPECTROSCOPY
STEAM GENERATORS
SURRY-2 REACTOR
TESTING
THERMAL REACTORS
THERMOCHEMICAL PROCESSES
TUBES
ULTRASONIC TESTING
VAPOR GENERATORS
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS
X-RAY SPECTROSCOPY