ML18348A203

License Event Report 1977-055-00 Re Loss of Off-Site Power and Plant Trip

ML18348A203
Person / Time
Site:	Palisades
Issue date:	12/16/1977
From:	Bixel D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-055-00
Download: ML18348A203 (3)

Text

i.

• • consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 December 16, 1977 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 - ER-77 LOSS OF OFF-SITE POWER AND PLANT TRIP

• Attached is a reportable occurrence related to the loss of off-site power and subsequent plant trip at the Palisades Plant.

David A Bixel Nuclear Licensing Administrator CC: ASchwencer, USNRC DEC l 9 1977

L.NSEE EVENT REPORT J* Palisades I __.._..__..__.I............__,I

. 'ucENSEE CONTROL BLOCK: ...

1 6

[PLEASE PAINT AL,L REQUIRED INFORMATION]

LICENSE EVENT NAME . LICENSE NUMBER TYPE TYPE 1 IMIAIPIAl1111 lolol-lololo lo lo 1-lolol l411l1l1l1I I oI 1 I

. 7 8 9 14 15 25 26 30 31 32 REPORT REPORT TYPE SOURCE OOCKET NUMBER EVENT CATE REPORT CATE

@ill coN'T r *1** 1 l!J l1J lol 51 ol-1ol21 51 51 l1l1l2l5J1l1I l1l2l1l6l1l1I 7 8 57 58 59 60 61 . 68 69 74 75 80 EVENT DESCRIPTION lol2I I During normal steady state operation, the "R" bus became de-energized causing a com- I 7 8 9 80 lo Isl L.I...;P;..l...;e;_t...;e:,....:l;.;.o...s...,s...._o_f,_o;...f..;f_-._s_i.;..t_'e....;p._o.._w..;.e.;;.r...;;;.an_d_r_e...s.....ul

• ._t._i_n.;;;;:g_.;..in...;....a_l_o_s..;.s..-..o_f.......

m...a..;;i;;,;;n_.;..co_n.....d_e;.;n;;,;;s._e....r_c_o_o._l_i_n;;;;;g....w a t.....e....r_."""'::::"::!I 7 8 9 80 lol41 I The rea.c:tor was manually tripped. The primary plant was stabilized in the hot. con- .I 7 8 9 80 lol51 L dition and was borated. LCOs of Tech Spec 3.1.1, 3.7.1 were exceeded. Event similar I 7 8 9 80

(§]ID I to ER-77-04J. (Contd on attached sheet.) I 7 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT COOE COMPONENT COOE SUPPLIER MANUFACTURER VIOLATION w

COOE 7

@El 8 9 IE 10 I A I L!J 11 lzlzlzlzl zlzl 12 . . . 17 w 43 44 I z I 9 I9 I9I

. 47 48 CAUSE DESCRIPTION 7

joj0j I Cause of 8 9 .

"R" bus loss not known and is. still under investigation. ,

I 80 lol9l1.-_____.....________________________,____-----_....-;-_____________________~

.~ 9'-----------------------------'"--------------------~8080

.~9- FACILITY METHOD OF EE]

7 8 STATUS 9

L!J 10

% POWER Io 1s I 5 I 12 13 N/A

---

"'""44 OTHER STATUS I w .,. . .

DISCOVERY 45 46

--~N/,.:.:A_ _ _ _ _ _ _ _~,

DISCOVERY DESCRIPTION 80 FORM OF ACTIVITY CONTENT 7

rn w 8 RELEASED 9

OF RELEASE l!J I 34.4 10 11 AMOUNT OF ACTIVITY (Contd below.)

44 45 I Secondary water to atmosphere.

LOCATION OF RELEASE 80 PERSONNEL EXPOSURES mID 101010 NUMBER I

TYPE

~

DESCRIPTION L------~N/~A_.;..______________________________.....______~

.7 8 9 11 12 13 80 PERS.ONNEL INJURIES NUMBER. DESCRIPTION EE I 010 I 01 N/A 7 8 9 11 12 80 PROBABLE CONSEQUENCES

• rn .

7 8 9 80 LOSS OR DAMAGE TO FACILITY 7

II@

8 9 w

TYPE 10 DESCRIPTION NA 80 PUBLICITY

[fill N/A 1 as 80

. . _ _ ' ADDITIONAL FACTORS

~ I (Amount of Activity - Contd) microcuries of I-131; 29.2 microcuries of I-133.

7 8 9 BO

~

7 8 9 80

• Attachment to Licensee Event Report 77-055 Event Description (Contd)

During the incident, a primary coolant leak occurred in the letdown line. The leak was isolated. Both diesel generators operated normally to supply electrical power during the incident. Electrical power was restored in 2.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

The delay in reporting this event was discussed with Region III. See our letter dated December 9, 1977.

(ER-77-55)