ML20084R557

From kanterella
Jump to navigation Jump to search
Telecopy Ro:On 750305,two of Three Control Rod Drives Failed to Meet Tech Spec Limit for 5% Scram Insertion Time. Possibly Caused by Normal Wear.Drives Will Be Scram Tested & Closely Monitored During Operation
ML20084R557
Person / Time
Site: Dresden Constellation icon.png
Issue date: 03/05/1975
From: Stephenson B
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8306150188
Download: ML20084R557 (1)


Text

__ -

y , us z > .w \ > u :" \

EE #

  • w tHOGfern Union .

Tele ra'm -

VEE l G 7( 14 51) ( 2 03 nO?OE G 63 ) PD 02 / 0 5 / 75 14A0 1975 ER -5 Fil ' IL -

ICC l i'Kn N GZ C3P P 15 9 /t 2 4 4 A 9 TDPN F0PDIS IL 155 03 vera C"/ ;~~ ' .2 T PX9 pMES C KE PPLF o , "rr IDG Al. D IPECIGP, D IT'~ CT O 3 A T E OF REC'lLATOPY PC ' T I C+ s , RECIPU

7. , 'i.e. T 7r I c , ' y
  • r y c 7;m [s313g , y rx ,

T; 7 ?00fCVELT DD CLEl. ELL Y' I L 0 01.' 7 909 JECT: SPR-P5, DRE'?EEN NUCLEAR F0 YEP "T AT IO P Ut: IT 3.

T H I S 'J ILL CON F IE A C O N VE P SA T IO h WITt! PHIL JONF")F nF Yns OFFICF t. T 15 t. 3 40NPc A ; A "C 4 ~; 0 t: C n ;Itr LrCAT IOU D UR I t:0 CONTROL RCD ~'I

l EXFRCISING OF FA IL U9E OF 3-PX2 C9D ARRAYS TO EEET THE TEC4 SPEC L IN IT FOR F IVE FERCENT SCRAM IN SERT IC 1 T IME FOR T1E T HREE FASTEST CO NT ROL RnD I t. A ?X2 ARRAY. TWO OF THESE THREE, PLUS ONE ADDITIONAL AR7AY ALro F AILEO in ?.EET Ti'E TS/Et;T Y PERCE NT INSERTI0'1 IIG. LIMIT.

T u E'T DR IVES ': ILL PF ;cF M. T c "TE D AG A lt. A .D IF FOUND iiITHIN L I n II:

SF-1201 (A5-69)

'J ILL U CL OSEL Y d',N IT DCED D UT: ING C PE R A T ION . IT IS SUSPECTFD THAT THE

? L O ',f T I::FS ARE ATI IE UT AELE TO P CT 4 A NCP' AL >:E A R mrnLt . ANC nY A PPEVIOUS TE?: D A Y 0 4T AC F D 'IP INr 4 ICH T I: F CP T DEPCSITT MAY 4 VE SEITLED IGT3 I4F DR IVE . 7 0 L L ' ' nP INFCR:AT100 IN Cl. nD I t:c T HE 9E e q. Ts

'F q uP -'E 7 !7 t, T E C P A M TPCTI'.

icII.L Fr F D P t. A 09 Fn TO YOU I' A TF' "AY 7FPORT D ' OT E P HF ': SC C E MPF' I':TF t:DP T DPE SDE N f:'J CL E A R P0 h'E R STATION C 0 r.'10 '. "' AL T 4 F D I FO N CCMPANY RD 1 MORRIS Il CCASC Ng

" ~ .,

g _

,3g0/, x 8306150188 750305 J4i o j- ".

'i-(t- h.

PDR ADOCV 05000249 -\,'. /' J  : }{.d .

s PDR

.,c-.

    • b -

4g

~

- & & Si L4_.h}h.'dn A,

a 9-- -

Sy~-yy.N $13'c3

., -s----

SF-120 t (RS-69)

-