ML20063E105

Final Part 21 Rept Re Failure of Expansion Joint E210D003 in Core Spray Pump Suction Piping,Initially Reported 820202. Properly Designed Expansion Joints Will Be Installed in Core Spray Pump Suction Piping

ML20063E105
Person / Time
Site:	Fermi
Issue date:	06/19/1982
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-82-665-000 10CFR-50.55E, EF2-58744, PT21-82-665, PT21-82-665-000, NUDOCS 8207130296
Download: ML20063E105 (2)

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June 19, 1982 EF2-58744 Mr. James G. Keppler, Regional Administrator-Region III U.S. Nuclear Regulatory Ccumission 799 Roosevelt Rcad Glen Ellyn, Illinois. 60137

Subject:

Final Report of 10CFR50.55(e) Item on Failure of Core Spray System Bellows (#53)

Dear Mr. Keppler:

This is Detroit Edison's final report on failure of core spray system

! bellows problem. This problem was originally reported to Mr. J.E. Konklin l of NRC Region III by Detroit Edison's Mr. H.A. Walker, Supervisor-Construc-tion Quality Assurance, on February 2,1982.

! Expansion: joint E210D003 failed when the Division I core spray pump suction piping was flooded to connence flushing. The failure was determined to have been a result of.the following:

a) The 300 psig internal pressure exerted on the expansion joint during the flushing operation exceeded the test pressure of 187 psig.

b) The expansion joints were not designed to restrict axial movement which was the intent of the piping analysis.

Examination of the damaged expansion joint showed that two of the three shipping bars broke loose and punctured the stainless steel flowliner. In order to continue flushing the core spray piping, the damaged expansion joint'-

was removed and-replaced with a temporary coupling. Expansion joint E210D004 in Division II of the cote spray pump suction piping was also removed to avoid a possible similar failure.

The failure of expansion joint E210D003 was not due to a generic problem associated with the use of such joints. The failure resulted from ex eding the expansion joints test pressure and by failure to specify the use of tie bars when purchasing the joints. Replacing the expansion joints with properly designed and installed joints will not lead to similar failure, provided the

' test pressures and temperatures are not exceeded.

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Mr. James G. Keppler, Regional Administrator - June 19, 1982 Page M EF2-58744 New (properly designed) expansion joints will be installed in the core spray pump suction piping. The expansion joints have been ordered for this application.

If you have questions concerning this matter, please contact Mr. H.A. Walker, Supervisor-Construction Quality Assurance.

Very truly y ,

HAW / DAW /cp cc: Mr. Richard DeYoung, Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Cm mission Washington, D.C. 20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Camission 6450 North Dixie Highway Newport, Michigan 48166

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