ML19209C419

LER 79-014/03L-0:on 790912,charging Pump 1-P2B Found to Have Cylinder Block Crack.Caused by Pressure Spiking During Compression Stroke Following Hydrogen Separation During Suction Stroke.Cracked Block Replaced

ML19209C419
Person / Time
Site:	Point Beach
Issue date:	09/26/1979
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19209C409	List: ML19209C408 ML19209C419
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7910150546
Download: ML19209C419 (1)

Text

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NRC FORM 366 U. S. NUCLEAR REdULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT (PLEASE PRtf4T OR TYPE ALL REOUIRED INFORMATION)

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EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h 10 2 10n 9-12-79 the 1-P2B charcinq oumo (1 of 3) was found to have a cyli W rl o 3 l block crack between the No. 2 cylinder and its suction port. Althouah  !

O 4 the limiting conditions were met, this constitutes an abnormal degra-o s I dation of a system designed to contain radioactive material o e l(T.S. 15.6.9.2.B.4). This event is similar to LER's 78-004/03L-0 and i O 7 l78-007/03L-0. Safety significance of this event was minimal. J o e I l 00 7 8 9 DE CODE SueCO E COMPON ENT CODE SU6 CODE S E O ?j l P I C l@ [E_j@ W @ l P l U l M l P l X l X I@ E l@ ( Z_j @ -

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O lThe charging pump is a variable caoacity Aiax Iron Works Tv~ T-125. TheI i i t eracked block was replaced with a new spare. Pressure spiking durina thel

, ,  ; compression stroke following hydrogen separation during the suction l

, , l stroke is suspected to have caused the cracking. Installation of l

, , suction stabilizers is planned. Discharge dampeners were installed 10 75 7 8 3 80 ST  % POWER OTHER STATUS dis O RY OtSCOVERY DESCRIPTION i s [,E_J@ l 1 0 l 0l@l N/A l l A l@l Observation of minor leakace l ACTWITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCAff 0N OF RELEASE 1 6 l Z l @ l Zl@l N/A l N/A l 7 3 3 to it 44 45 30 PERSCNNEL EXPOSURES NUMBER TYPE O ESCRIPTION

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3 8 9 l Z i@l!ON/A 60 7 91015 0.5 ft 7

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68 69 llll llll ll ll l; 30 5 NAME OF PREPARER C. W. Fav PHON E: 414/277-2811 2,