ML20002A466

Tech Specs 8.0,Section D,Re Operating Procedures & Restrictions,Limiting Linear Heat Generation Rate

ML20002A466
Person / Time
Site:	Yankee Rowe
Issue date:	12/29/1975
From:	YANKEE ATOMIC ELECTRIC CO.
To:
Shared Package
ML20002A465	List: ML20002A464 ML20002A466
References
NUDOCS 8011170279
Download: ML20002A466 (6)

Text

{{#Wiki_filter:_ ( -{- Q .? -Sb'- ' 8.0' PROPOSED-CHANGES TO TECHNICAL SPECIFICATIONS 'It is requested that the following revisions be made to the Technical ~ Specifications. Section B. DESIGN SPECIFICATIONS Add the following paragraph: -"3. ' The Performance Analysis.for the current reload core is incorporated as a part of these technical specifications. The analysis presented. in the FSAR for Core XI forms the basis for the' reference core performance analysis". Section D. OPERATING PROCEDURES AND RESTRICTIONS ~ 2. Operating Limits c. Thermal Revise paragraph (1) to read as foll'ows: " (1) 'During: steady state power operation, the peak linear heat rate shall not exceed the limits shown in Figure 8-1. With' these limits, if full power cannot be attained, the allow-abic fraction of full power shall be calculated as follows: Limiting LHGR Allowable Fraction of Full Power = Peak Full Power LHGR where the-limiting LHGR is obtained from Figure 8-1. The peak full power'LHGR shall include the following: Heatfluxpowerpeakingfactor,F(10%; measured using a) core instrumentation at a power >, b) Effect of inserting the contrc) bank from its position (F ) as at the time of measurement to its insertion limit I shown in. Figure 8-2. The rod insertion limit is shown in Figure 8-3; c) Effect of' xenon redistribution (1.10); d). Shortened stack height factor (1.009); e) Measurement uncertainty (1.05); f) Power icvel uncertainty (1.03); g) lleat flux engineering f actor, Fk, (1.04); h) Core average linear heat generation rate at full power (4.34 kw/ft). e

g Th2ca fcctors era multiplicativs' end items (a) and (d). 'shall'be chosenist.a core height'so as to maximize their l product. )When operating at constant power, all rods out, with equilibrium xenon, power peaking in the YankeRowe~ core decreases monotonically as a function e ofJcycle burnup. This has'been verified by both calcu-lation and~ measurement'on Yankee cores and is in accord .with'the expected behavior in a core-that does not-

contain burnable' poison.

The'all-rods-out power peaking measured at.any time' in core. life thus provides an upper ~ bound on ARO power peaking for the remainder of that cycle.. Therefore,.the me'asured poker peaking shall' be checked every 1000 equivalent full power hours and the latest measured value shall be-used in the computation. The-only effects.which can-increase peaking beyond this value would be. control rod insertion and xenon transients'and these are' accounted - for in items (b) and (c). These proposed changes reference this report as the-performance analysisLfor the current reload core while retaining the performance analysis for the reference cord in the FHSR. The section on core thermal performance is also. changed to reflect the results of the LOCA ~ analysis and to describe the manner in which core tharmal performance will be monitored. No other changes are required. e 9 e 9 9 9 8 6 m o E 4 m

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i }j NRC DISTR TIOiY F 3R PART S0 DOCKET MA . t l AI. o i

• (TEW5RA'RY FORM)

CONTROL NO: Z Z-o i. / a \\ l' FILE: FROM: Yankee' Atomic Elec Co DATE OF DOC DATE REC'D LTR TWX RPT OTHER Westborough, Mass {_ D E Vandenburnh 12-29-75 1-5-76 XXX TO: ORIG CC OTHER SENT ERC PDR XX NRC 3 signed SENT LOCAL PDR XX j CLASS ' UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NC: j XXXXXX 3 50-29 [ DESCR!PTION: ENCLOSURES: Ltr notari cd 12-29-75....trans the following: Amdt to OL/ Change to Tech Spec's #125, suppi

1. 6:

Consisting of revisions to Appendbc A

;;3 with regard to ECCS modifications..........

W'.. l (40 cys enc 1 rec'd) P'LANT NAME: Yankee Rowe A FOR ACTION /INFC Al4ATION 1-7-76 ehf BUTLER (L) SCHWENCER (L) ZIEMANN (L) REG AN (E) REID(L) W/ Copics W/ Copies W/ Cop'es 'W/ Copics W/ COPIES CLARK (L) STOLZ (L) DICKER (E) LEAR (L) W/ Copics W/ Copies W/ Copics W/ Copies PARR (L) VASSA L t.O (L) KNIGitTON (C) SPICS W/ Cepics W/ Copies W/ Copies W/ Copies KNiEL (L) PURPLE (L) YOUNGBLOOD (E) Lnt W/ Copics / W/LCopies W/ Copics W/ Copics INTERNAL DISTRIBUTION Af4EG_ FILE 3 TECH REVIEW DENTON ~LIC ASST ~A/T IND. fNRC PDR sCHROEDER GRIMES R. DIGGS (L) BRAITinAN /OGC. ROOM P-50GA MACCARY GAMMILL H. GE ARIN (L) SALTZMAN MOSSICK/ STAFF KNIGHT KASTN E R E.' GOU LBOURNE (L) MELTZ CASE PAWLICKI BALLARD P. KREUTZER (E) SHAO SPANG LE R J. LEE (L) PLAtjS_ BOYD j.STELLO M. nU3. inn 0cr(L) MCDONALD MCORE (L) HOUSTON E NV1 RO_ S. REED (E) CHAPMAni DEYOLING (L) , A'OVAK(h) MULLER M. SERVICE (L) DUBE (Ltr) Sh0VHOLT (L) RUSS DICKER y S. SHEPPARD (L) E. COUPE j GOLLER (L) (Ltr) IPPOLITO KNIGHTON M. SLATER (E) PETERSON P. CO L LINS J EDESCO YOUNGBLOOD H. SMITH (L) HARTFIELD (2) DENISE J. COLLINS REGAN S. TEETS (L) KLECKER REG OPR ,A_AI N AS PROJECT LDR G. WILLI AMS (E) EISENHUT fflLE & REG!ON (2) BENAROYA . _.14 (4'. ESS R. ING R ' %1 (L) V. WILSON (L) WIGGINTON M1?C VOLLMER M. DUNCAN @ R. PARRISH (L) EXTERNAL DISTRIBUTION yt - LOCAL POR G M/C Id N * =~ i 1 -TIC (ARERNATHY) (1)(2)(10) - N ATION AL LABS 1 - PDR SAN /LA/NY ', 1 - NSIC (E UCH ANAN) 1 - W. PENNINGTON, Rrn E 201 GT t - BROOKHAVEN NAT LAB 1 - ASLB 1 - CONSULTANTS. 1 - G. ULRIKSON ORNL 1 - Newton Anderson N EWM AR K/BLUM E/AG B ABI AN ,/ (,, - ACRS UCLG4ff6/SENT gg ~ u, .}}