ML19317D213

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Proposed Tech Spec 3.1. Incorporating Revision to Pressurization,Heatup & Cooldown Limitations.B&W 780125 Ltr to Util Re Corrections to Errors Discovered in B&W Rept BAW-1436 Encl
ML19317D213
Person / Time
Site: Oconee  Duke Energy icon.png
Issue date: 02/21/1978
From:
DUKE POWER CO.
To:
Shared Package
ML19317D205 List:
References
NUDOCS 7911190604
Download: ML19317D213 (7)


Text

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j s 3.1.2 Pressurization, Heatup, and Cooldown Limitation Specification 3.1.2.1 The reactor coolant pressure and the system heatup and cooldown rates (with the exception of the pressurizer) shall be ILnited as follows:

Heatup:

Heatup rates and allowable combinations of pressure and tempera-tures shall be limited in accordance with Figure 3.1.2-1A Unit 1 3.1.2-1B Unit 2 3.1.2-lC Unit 3 i Cooldown:

Cooldown rates and allowable combinations of pressure and tempera-ture shall be limited in accordance with Figure 3.1.2-2A Unit 1 3.1.2-23 Unit 2 3.1.2-2C Unit 3 3.1.2.2 Leak tests required by Specification 4.3 and ASME Section XI shall be limited to the heatup and cooldown rates and allowable combinations of pressure and temperature provided in Figure 3.1.2-3A Unit 1 3.1.2-3B Unit 2 3.1.2-3C Unit 3 3.1.2.3 For thermal steady state system hydro tests required by ASME Section XI the system may be pressurized to the 1Laits set forth in Specification 2.2 and 3.1.2.2.

3.1.2.4 The secondary side of the steam generator shall not be pressurized above 237 psig if the temperature of the vessel shell is below 110 F.

3.1.2.5 The pressurizer heatup and cooldown rates shall not exceed 100 F/hr.

The spray shall not be used if the temperature difference between the pressurizer and the spray fluid is greater than 410 F.

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3.1-3

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.1 3.1.2.6 Prior to exceeding eight (Unit 1) four (Unit 2) four (Unit 3) effective full power years of operation.

Figures 3.1.2-1A (Unit 1), 3.1. 2-2A (Unit 1) 3.1.2-1B (Unit 2), 3.1.2-2B (Unit 2) 3.1.2-lC (Unit 3) , 3.1. 2-2C (Unit 3) and 3.1.2-3A (Unit 1) 3.1.2-3B (Unit 2) 3.1.2-3C (Unit 3) and Technical Specification 3.1.2.1, 3.1.2.2 and 3.1.2.3 shall be updated for the next service period in accordance with 10 CFR 50, Appendix G, Section VmB.

3.1.2.7 The updated proposed technical specification referred to in 3.1.2.6 shall be submitted for NRC review at least 90 days prior to the end of the service period.

Appropriate additional NRC review time shall be allowed for proposed technical specifications submitted in accordance with 10 CFR 50, Appendix G, Section V.C.

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Bases - Units 1, 2 and 3 All components in the Reactor Coolant System are designed to withstand the effects of cyclic loads due to system temperature and pressure changes.

These cyclic loads are introduced by normal load transients, reactor trips, startup and shutdown operations, and inservice leak and hydrostatic tests.

The various categories of load cycles used for design purposes are provided in Table 4.8 of the FSAR.

The major components of the reactor coolant pressure boundary have been analyzed in accordance with Appendix G to 10 CFR 50. Results of this analysis, including the actual pressure-temperatur g imitations g the reactor ant pressure boundary, are given in BAW-1436 , BAW-1437 and BAW-1438 The Figures specified in 3.1.2.1, 3.1.2.2 and 3.1.2.3 present the pressure-temperature limit curves for normal heatup, normal cooldown and hydrostatic tests respectively. The limit curves are applicable up to the indicated effective full power years of operation. These curves are adjusted by 25 psi and 10 F for possible errors in the pressure and temperature sensing instruments.

The pressure limit is also adjusted for the pressure differential between the point of system pressure measurement and tne limiting component for all operating reactor coolant pump combinations.

The pressure-temperature limit lines shown on the figure specified in 3.1.2-1 for reactor criticality and on the figure refered to in 3.1.2.3 for hydrostatic l testing have been provided to assure compliance with the minimum temperature requirements of Appendix G to 10 CFR 50 for reactor criticality and for inservice hydrostatic testing.

The actual shift in RT f the beltline region material will be established NDT periodically during operation by removing and evaluating, in accordance with Appendix H to 10 CFR 50, reactor vessel material irradiation surveillance specimens which are installed near the inside wall of this or a similar reactor vessel in the core region, or in test reactors.

The limitation on steam generator pressure and temperature provide protection against nonductile f ailure of the secondary side of the steam generator. At l metal temperatures lower than the RT of +60 F, the protection against non-l ductilefailureisachievedbylimitEngthesecondarycoolantpressureto 20 percent of the preoperational system hydrostatic test pressure. The lim-itations of 110 F and 237 psig are based on the highest estimated RT of

+40Fandthepreoperationalsystemhydrostatictestpressureof131[psig. r The average metal temperature is assumed to be equal to or greater than the coolant temperature. The limitations include margins of 25 psi and 10 F for possible instrument error.

The spray temperature difference is imposed to maintain the thermal stresses at the pressurizer spray line nozzle below the design limit.

3.1-4

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o REFERENCES (1) Analysis of Capsule OCI-E from Duke Power Company Oconee Unit 1 Reactor l Vessel Materials Surveillance Program, BAW-1436, September 1977.

(2) Analysis of Capsule OCII-C from Duke Power Company Oconee Unit 2 Reactor Vessel Materials Surveillance Program, BAW-1437, May 1977.

(3) Analysis of Capsule OCIII-A from Duke Power Company Oconee Unit 3 Reactor Vessel Materials Surveillance Program, BAW-1438, July 1977.

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OCONEE UNIT I ONLY O

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REACTOR COOLANT SYSTEM NORMAL OPERATION-HEATUP LIMI-i TATIONS t.?PLICABLE FOR FIRST l 8.0 EFFECTIVE FULL POWER YEARS
/ UNIT 1 n u rowie OCONEE NUCLEAR STATION l ' --' Figure 3.1.2-1A

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i REACTOR COOLANT SYSTEM l INSERVICE LEAK AND HYDRO-STATIC TEST HEATUP AND i C00LDOWN LIMITATION APPLICABLE FOR FIRST 8.0 1 EFFECTIVE FULL POWER YEARS ocu roma OCONEE gLEAR STATION Figure 3.1.2-3A

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O o l THE BABCOCK & WILCOX COMPANY ,

I POWER GENERATION GROUP To l DISTRIB1TrION From A. L. LOWE, JR. TECHNICAL STAFF sos 663.s Cust. File No.

DUKE POWER COMPANY (OCON'EE UNIT 1) or Ref. BAW-1436 Subj. ANALYSIS OF CAPSULE OCI-E FROM DUKE POWER COMPANY Date OCONEE hTCLEAR STATION, UNIT 1 - REPORT BAW-1436 JANUARY 25, 1978 i.n., e. ...., ... ..o.... ..d ... .. %. ..i r.

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Errors have been discovered on pages 8-2 and 8-3 of report BAW-1436 and should be corrected as follows:

1. Page 8-2, second paragraph, first sentence: Should read ". . .at the end of the eighth full-power year." instead of "...at the end of the sixth full power year."
2. Page 8-2, third paragraph, first sentence: Should read "...end of the eighth full-power year are. . ." instead' of ". ..end of the sixth full power year are..."
3. Page 8-3, second sentence: Should read "...up to the ninth effective..."

instead of "...up to the seventh effective..."

ALL:dah ,

Distribution:

Duke Power Company (70) Merchent, JW Helmbrecht, HL/NED Barberton c/o CD Russell, OFR Moore, KE Young, DE/NED Barberton Behnke, HW/Mt. Vernon rgan, A g es, PS/ Alliance Borsum, RB/Bethesda ewt n, ulick, ET/M C W ,

d M Palme, HS (2) Gross, LB/LRC Durant, WP/Mt. Vernon *** * #' """*

    • 7' Schuler, TM Rowe, JP/ Alliance

, Sivashankaran, S/Mt. Vernon ZurLippe, CF/LRC (2)

Smith, RM eyw rt , (3) evstek, DF Travis, CC/TRG Whitmarsh, CL (2)

Wimmer, LB o (4)

. _ . . _ . . , _ _ _ _ - . - _ -