ML19309A373
| ML19309A373 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 04/15/1974 |
| From: | Spencer G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Thornburg H US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19309A374 | List: |
| References | |
| NUDOCS 8003270826 | |
| Download: ML19309A373 (1) | |
See also: IR 05000312/1974002
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APP.151974
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H. D. Thornburg, Chief. Field Support & Enforcement Br.
Directorate of Regulatory Operations, HQ
SACRAMENTO MUNICIPAL UTILITY DISTRICT (RANCHO SECO)
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DOCKET NO. 50-312
The attached report by our field inspector of a visit to the subject
facility on March 4-5, 11-13, 18-20 and 22, 1974 is forwarded for
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information. No violations were identified during the inspection.
The report includes observation of an unsuccessful lift-off test The
performed on a tendon associated with the containment building.
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technique used to test the tendon, and the results achieved, indicate
that repeated testing.of a given tendon may cause progressive damage.
L. L. Beratan, Senior Structural Engineer, Technical Assistance Branch,
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observed the test and has discussed the breaking of the wires with DL.
We have been informed by Karl Seyfrit, Chief, TAB, that Licensing will
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evaluate the generic implication of this mode of failure and its effect
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on the long term inservice surveillance program. .In addition, it is
our understanding that Beratan intends to follow the licensee's proposed
test program designed to determine the effects of repetitive testing of
a given tendon.
We also find that the licensee's efforts to improve their QA program
for operation is developing satisfactorily. We will continue to
monitor the implementation of this program.
g. acc.
G. S, Spencer, Chief
Reactor Construction.and
Operations Branch.
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RO Inspection Report No. 50-312/74-02
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