Stress analysis of the LOFT Modular DTT flowmeter for LOCE transients (L1-5 and L2-4). [Drag disc turbine transducer]

Technical Report · Fri Mar 03 04:00:00 EST 1978

OSTI ID:5499879

Mosby, W R

This report presents the results of a stress analysis of the LOFT Modular Drag Disc Turbine Transducer (MDTT). Loading conditions considered included steady-state frontal and transverse fluid dynamic pressure, alternating transverse pressure due to vortex shedding, and thermal expansion loads. Ten different meter locations in the LOFT cooling system were considered for nuclear LOCE's (L2-4) and one location for non-nuclear LOCE L1-5. Stresses were found to be within allowables defined by Section III of the ASME Boiler and Pressure Vessel Code, 1977 Edition, Subsection NB (Class 1), where applicable. In order to maintain good engineering practices for torquing small screws, the specified torquing values for the screws inside the MDTT body are set at values which exceed the non-applicable stress requirements of Class 1 components in Section III of the ASME Boiler and Pressure Vessel Code. In the unlikely event of failure of these screws, no possible damage to the primary coolant system could occur since the screws would remain captured inside the MDTT body.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5499879
• Report Number(s): EGG/LTR-141-77; RE-A-77-118; ON: DE85015436
• 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
ACCIDENTS
FLOWMETERS
LOFT REACTOR
LOSS OF COOLANT
MEASURING INSTRUMENTS
METERS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTORS
RESEARCH AND TEST REACTORS
STRESS ANALYSIS
TANK TYPE REACTORS
TEST REACTORS
TRANSDUCERS
WATER COOLED REACTORS
WATER MODERATED REACTORS