ML17317B544

Forwards Info Re Qualification Pressure for safety-related Equipment in Drywell.Drywell Pressure of 0.7 Psia Calculated & Will Be Used to Qualify All safety-related Equipment in Drywell Required During & After LOCA

ML17317B544
Person / Time
Site:	05000447, 05000531, 05000550
Issue date:	10/11/1978
From:	Sherwood G GENERAL ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
MFN-385-78, NUDOCS 7810180108
Download: ML17317B544 (2)

Text

NRC FORM 366 7 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: Q1 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

"1 6

~97 7 8 9 M 1 0 C C LICENSEE CODE 1

14 Q2 15 0 0 0 0 0 0 LICENSE NUMBER 0 0 0 0 0 25 Q24 26 1 1 1 LICENSE TYPE 1

30 QR~Qs 57 CAT 58 CON'T soo'RR,~LQR 0 5 0 0 0 3 1 8 Q70 8'.2, 8 7 8 74 Qs 75 0 9 2 7 7 8 Qe 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~o2 ON 8-28-78 DURING A RAPID LOAD REDUCTION FROM 100Ã to 805 THE AXIAL FLUX DIFFERENCE WENT OUTSIDE THE TARGET BAND. THE AXIAL FLUX DIFFERENCE WAS RESTORED TO WITHIN THE

~p4 'ARGET BAND IN 12 MINUTES IN COMPLIANCE WITH THE 15 MINUTE ACTION RE UIREMENT OF 6 T. S ~ 3~2~1 ~ SINCE THE TIME OUTSIDE eTHE TARGET BAND WAS LIMITED, PEAKING FACTORS WERE NOT SUFFICIENTLY ALTERED BY XENON REDISTRIBUTION UPON THE SUBSEQUENT RETURN TO RATED THERMAL POWER TO CAUSE ANY PROBABLE ADVERSE CONSEQUENCES' B SIMILAR OCCURRENCE; 050-.315 78-.013 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE.

,CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~OB ~ZZ Qll X Q72 ~ZQ72 Z Z Z Z Z Z Q14 ~ZQls ~Z:

20 Qls 7 8 9 10 11 12 13 18 19 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LF RIRO flsPORT ACTION FUTURE EVENT YEAR

~78 22 21 EFFECT

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23 SHUTDOWN 24 REPORT NO.

~08 I 26 Q~

27

~03 ATTACHMENT 28 CODE 29 NPRDC TYPE QL 30 PRIME COMP.

LJ 31 NO.

LOJ 32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

[ ZJQls ~ZQ19 ~ZQ29 LZJQ>> O O O O N Q22 ~SQ24 ~ZQ25 Z 9 9 9 Q29 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o REPAIRS TO TWO S E R

.AIR EJECTORS AS B TH V E PREVENT. A LOH'ACUUM TRIP UNTIL THE STEAM WAS RESTORED. AT TH T 3 HERE BORATED OUT TO RESTORE THE'XIAL FLUX TO WITHIN THE TARGET BAND AND POWER W RETURNED TO 100K.

8 80 9

~

7 FACILITY ~3P METHOD OF STATUS 98 POWER OTHERSTATUS DISCOVERY DISCOVERY DESCRIPTION Q32 7

s 8 9

~FQ29 ~l0 10 0 Qe 12 13 NA 44

~AQ27 45 46 OPERATOR OBSERVATION 80 W

G ACTIVITY RELEASED OF RELEASE

. Z Q33 CONTENT ZQ34 AMOUNTOF ACTIVITY ~ NA LOCATION OF'ELEASE Q 7 8 9 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 7 ~00 0 Qsl Z Qos NA 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 41 9 ~00 0 QRo 80 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION Q43 9 Z Q42 NA 7 8 9 10 80 PUBLICITY NRC USE ONLY cv a

7 8 9 IO~ 68 69 80 a 0

(616) 465-,5901

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