ML18348A220

License Event Report 1977-038-00 Re Abnormal Degradation of Containment Boundary

ML18348A220
Person / Time
Site:	Palisades
Issue date:	08/26/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-038-00
Download: ML18348A220 (2)

Text

consumers

• Power company General' Offices: Zl2 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 August 26, 1977 File Cy.

J.legu\atory

~---*-*

Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR PALISADES PLANT - GR-77-038 -

ABNORMAL DEGRADATION OF CONTAINMENT I

BOUNDARY Attached is a reportable occurrence relating to degradation of a containment boundary for the Palisades Plant. The event was reported by Telex on August 15, 1977.

~MuPfl 46~

David P Hofi'man Assistant Nuclear Licensing Administrator CC: ASchwencer, USNRC

LICENSEE EVENT REPOR,.

, Palisades CONTROL BLOCK: -.I_...___...I__...I__._I_l__.1 [PLEASE PRINT ALL REQUIRED INFORMATION]

1 6 UCENse LICENSE EVENT NAME l.ICENSE NUMBER' TYPE TYPE 01,1 Ml II Pl Al Lil I lo Io 1-1 ol ol ol ol ol-lo lo I 14111111111 Io 11 I 7 8 9 14 15 25 26 30 31 32 COCK~ NUMBER EVENT CATE REPORT CATE

@m.coN'T f*T_*_I 1015101-101215151 I o I 8 I ii 4 I 7 I 1 I lol8l2l6l1l1I 7 B 57 58 61 68 69 74 75 BO EVENT DESCRIPTION 10121 I During the quarterly testing of the containment penetration No 4, purge air exhaust, I 7 8 9 80 lal3I I the penetration did not hold the minimum required pressure per Tech Spec 4.5.2. The I 7 B 9 80 lol41 1*plant was. shut down within the required 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> and repairs initiated to repair .I 7 B 9 80 lal51 I Fisher Continental butterfly valve (CV-1805). (ER-77-038) I 7 8 9 80 lfilID 7 8 9 80 PRIME SYSTEM CAUSE COMPONENT COMPONENT cccE cocE SUPPLIER MANUFACTURER VIOl.ATION w

COMPONENT COCE

@E}lslDl*W lvlAILlvlElxl IF 11 121 5 I L!J 7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION falal I The valve is a 48" butterfly valve with pressurized rubber seats. Inspection of the I.

7 8 9 80 lalsl I seat showed that it was badly worn from interaction with.the valve disc. Normal wear I.

~9 80

~ _I_ma ___y_h_a_v_e_b_e_e_n_c_o_m__p_o._un......,d_e_d_b__y_im_p__r_o....p...e_r_t_i_*mi_*_n....g..._o_f_t_h_e_v_a_l_v_e_s_e_a_t__p_r_e_s..,.s_ur

....._i_z_at_i_on_'w_it_h_ _,..._ _.I 8 9 FACILITY METHOO OF (contd on Line 18) 80 EE]

7. 8 STATUS L!J 9 10

% POWER I ii 0 I 0 I 12 13 OTHER STATUS L~~~=iii....d_._ ___.I 44 w

CISCCVERY 45 46 CISCOVERY DESCRIPTION

. _I______N_A_ __,__ _ _~I

• 80 FORM OF ACTIVITY. CONTENT 7

rn 8 REl.EASEC L!J 9

OF REI.EASE W

10 11 AMOUNT OF ACTIVITY

~I_ _ _N_A_ _ _. . ,.I 44 45 l.OCATION OF REI.EASE NA 80 PERSONNEL EXPOSURES

~I NUMBER 010101 L!J TYPE DESCRIPTION

.,....__N_A_____________________________________-------~

7 8 9 11 12 13 80 PERS'ONNEL INJURIES NUMBER DESCRIPTION 12)) I 0 I 0 I 0 I .,....__N_A________________________________________________.

7 8 9

. -. 11. 12 80 m PROBABLE CONSEQUENCES NA ..

7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION 7ll1fil89~ NA 10~----------------------------------------------------------------------------1 80 PUBLICITY IIB NA 7 8 9 80

• ADDITIONAL FACTORS Continued from "Cause Description"

~ I valve closure.

• The valve is designed so that after the valve is fully closed, the rub-I 7 8 9 80 ber seat is press~ized to *f;~~e the seat against the valve disc. Inspection pro-E]fil I cedures hav~ been modified to emph~size proper timing of seat pressurization.

7 8 9 80