ML19209B268

LER 79-060/030-0:on 790904,reactivity Required to Demonstrate Shutdown Margin Was Found to Be Larger than Value Used During Demonstration at Beginning of Current Fuel Cycle

ML19209B268
Person / Time
Site:	FitzPatrick
Issue date:	10/03/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19209B267	List: ML19209B266 ML19209B268
References
LER-79-060-03L, LER-79-60-3L, NUDOCS 7910090422
Download: ML19209B268 (2)

Text

LICEl\iSEE E\/ENT REPORT CONT ROL BLOCK:

llllll(PLE ASE PRINT OR TYPE alt. REQUIRED INFORMATIOM

-i o fol Nl Yl Jl Al F 1l@l0 0-0 0 0l0- l 0 l 0 l 0 l@l 4 1 l1 l1 1@lJ@1'8 9 LICENSEE CODE 14 15 LICENSE NUM3ER JS 26 LICENSE TYPE JO 57 C AI 58 CON'T"$ns lL l@l0 5 l0 l0 0 l 3 l 313 l@l 0 l 9 l 0 l 4 l 7 l 9 l@l 1 l 0 l 0 l 31719 @

o 1 7 8 60 61 DOCKET NUMBER 68 63 EVENT DATE 74 75 REPOR T D ATE 80 EVENT DESCRIPTION AND PRO 3ABLE CONSEQUENCES h o 2 lPlease See Attachment l0 3l_lo.: 1 I O 5ll0 6 1 1 0 7llo alI 7 8 9 80 SYSTEAS CAUSE CAUSE COYP.valve CODE CODE SUBCODE COVPON".N~ CODE SUBCCDE SUBcOCE o o Iz zlO Lxj@ L J@ Iz I IzIzIzIz18 I l@ 6 @7 8 9 10 11 12 13 18 19 20 SEQUE NTI AL OCCU1 Af NCE REFORT REVISION EVENT YE AR RLPOR T NO.

CODE YPE N@"L E R AO LLl9!-I I 6 0li-10 13 .;;;j_i i jt.=_ 21 12 23 24 26 27 28 23 30 31 32 AC lON FUTURE EFFECT SH J T DCV4N ATT ACHVE *JT P.P R O 4 FRl*.1E COMD.

COYPONENT TAKEN ACT N ON Pl ANT* ET 400 H OU 545$U9' TTED FOR i sUH.

SUP'.l E R MANUFACTURER l*l@ U @l l@.'I l@10l0l0;[_jgljglglzj9l9l9lg

, 33 34 35 36 3/40 di 42 43 44 47 CAUSE DESCRIPTIOPJ AND CORRECTIVE ACTIONS h i o lPlease See Attachment l11 11l I i 2 llal I i i.L!7 8 9 80*STA S , POV.E R OTHER ST A TUS ISCO RY DISCOVERY DESCRIPTION g@ l 0; 0l 2lg NAllA[glManagement Review li s" JTivi TY CCslT E N T

'"'***'6*AMOUNT OF ACTIVITY @ l LOCATION OF RELE ASE @

REM ASED OF DELE ASE l z j @ Og NAlNA i r,l7 8 9 IJ it 44 45 80 PERSONNEL f xPOSURES

• .t 'V H E R TYPF DE SCRIP TION olol01@lzlgl n i il7 8 9 11 12 13 SJ PERSONNE L INJUPIES NtJYHE R DESCRIP TION l0l0l0l@lNA i a 7 8 9 11 12 80 LO',5 0F CR DAV AGE TO F ACILITY j j j TvPE DE SCRIP TION NAllllzlglli 9 7 8 9 to PO isq[f@ot5c.n,PTION @" " 7 D I O 0'9 0 9-2 g NR USc ONu

, , 12101 illlllllllll I i I ;, 7 8 9 10 e; H 63 80 i W. Verne Childs 315-342-3840 0 N A*.iE OF PRE P AREFI PHONE i

%POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FlTZPATRICK NUCLEAR POWER PLANT

'.DOCKET NO. 50-333 ATTACHMENT TO LER 79-060/03L-0 Page 1 of 1_While conducting a normal startup and during management review of updated fuel parameters received frora the fuel vendor, a change in the magnitude of the temperature co-e f # ' ci en t of react i vi ty was noted. The shut down margin demon-stration performed following the 1978 Refueling used the temperature co-ef ficien-of reactivity value of minus 0.58 (E-5) f/F compared to an updated value of minus2.3(E-5)Sh/F.

Review of the shut down margin demonstration utilizing this new temperature co ef ficient revealed that the reactivity insertion re-quired to denonstrate the shut down margin was approximately 0.05% Ak larger.

'than the value actually used during the demonstration performed at the beginning of the current fuel cycle.

Recalculation, based on the new value of temperature co-ef' cient of re-activity and the data from the in sequence critical for this startup, show that the shut down margin capability at the beginning of the cycle was greater than 1.0% compared to the value of R+.38% requi red by the Technical- Speci fications Appendi x A, Paragraph 4. 3. A. I .

Based on this finding, the event did not represent any significant hazard to the public health and safety.

.1114 181.