ML20067B665

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Forwards Inservice Insp Program Plan for 1980-1983, Incorporating Changes & Additions Since 780928 Transmittal
ML20067B665
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 12/01/1982
From: William Jones
OMAHA PUBLIC POWER DISTRICT
To: Clark R
Office of Nuclear Reactor Regulation
Shared Package
ML20067B668 List:
References
LIC-82-358, NUDOCS 8212060266
Download: ML20067B665 (2)


Text

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Omaha Public Power District 1623 HARNEY a OMAHA, NE8RASKA 68102 a TELEPHONE S36 4000 AREA CODE 402 0'

December 1,11982 LIC-82-358 Mr. Robert A. Clark, Chief U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Washington, D.C. 20555

Reference:

Docket No. 50-285

Dear Mr. Clark:

Fort Calhoun Station Inservice Inspection (ISI) Program Plan for the 1980-1983 Period Omaha Public Power District's letter dated September 28, 1978 transmitted the District's last revision to the ISI Program Plan and was applicable for the years 1976-1980. The District has now revised the ISI Program Plan to incorporate pertinent changes and additions since the last revision. Note that where required these changes have been previously approved by the Commission. Accordingly, for your inform-ation please find attached the report entitled "0maha Public Power District Fort Calhoun Station Unit No.1 Inservice Inspection Program Plan for the 1980-1983 Period". Attachment 1 identifies by plan page number the changes made to the plan since the September, 1978 revision and includes justification for these changes. Attachment 2 contains the subject report.

Since rely, i

lv lifdO' W. C. ones Divis n Manager Produ ion Operations WCJ/TLP:jmm Attachments cc: LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.

Washington, D.C. 20036 8212060266 821201 p0 PDR ADOCK 05000 Q

~ _ _ _ _

Attachment 1 The changes and additions to the ISI Program Plan implemented by the August,1982 revision are detailed below. The changes / additions are identified by their page number location in the plan included as Attach-ment 2.

1) Pagr.1, Introduction This change revises the time period for which this ISI Program Plan is applicable.
2) Page 1, Part 1.2.1 This addition incorporates the statement that the plan covers part of the first ten year ISI Program interval for the Fort Calhoun Station, which covers the period September 26, 1973 to September 26, 1983.
3) Page 7, Appendix IB, Item No. B 1.4 The September, 1978 revision indicated that equipment was being developed to provide for 100% examination of the reactor vessel (RV) nozzle-to-vessel welds. Combustion Engineering has determined that these welds can be fully inspected from inside the nozzle utilizing a special RV examination device. The wording in the ISI Plan has been changed to' reflect this inspection, which will be completed during the 1983 refueling outage.
4) Page 14, Exceptions Changes the sentence, "Two men are required in the pump rooms at all times during the test." to "Two men are required in the pump rooms for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> during the test."

This change provides the basis for the 240 mrem exposure cited in this paragraph.

5) Page 25 Valves LCV-218-3, HCV-240, and PCV-210 have been deleted from the i ISI testing program because they are not safety-related. These valves were not addressed in the Commission's SER dated July 2, 1979 for the ISI Program at the Fort Calhoun Station because the Commission agreed during two telephone conversations on March 19 and March 23, 1979, between B. Hickle of the District and A. Wang of the Commission, to eliminate these valves from the ISI testing l requirements.
6) Pages 26 and 27 During an engineering evaluation, the District determined that the maximum permissible opening time for the normally closed LPSI and HPSI loop valves is 12 seconds to ensure adequate SI flow reaches l

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the reactor when needed. This evaluation conclusion has been incorporated into Section 6.2.3.6 cf the Updated Safety Analysis Report. Accordingly, the maximum permissible stroke times for LPSI valves HCV-327, 329, 331, and 333 and HPSI valves HCV-311, 312, 314, 315, 317, 318, 320, and 321 have been revised from 9.9 seconds to 12 seconds.

Additionally, the test schedules for valves HCV-347 and 348 have been revised from a cold shutdown (CS) to a refueling outage (RO) frequency. This change facilitates the testing of these valves while the reactar vessel cavity is flooded and, thus, shutdown cooling system operation can be temporarily terminated. Testing in the CS condition requires an alternate primary system heat removal path by means of steam generator blowdown, which provides marginal heat removal capability for this purpose. Therefore, a R0 frequency is justified and will ensure functional testing is conducted at a frequency sufficient to identify valve operability problems.

7) Page 28 The stroke time for raw water valves HCV-28808, 2881B, 2882B, and 2883B have been revised to 45 seconds to reflect the installation of new valves during the 198E refueling outage.
8) Page 29 The auxiliary feedwater system cross-tie valve to the main feed-water system (HCV-1384) has become a critical valve in the Dis-trict's justification for ensuring feedwater can be supplied to the steam generators in certain accident scenarios. Accordingly, HCV-1384 has been added to the ISI Program.
9) Pages 31 and 34 The following relief valves have been deleted from the ISI Program because the District has reviewed the valve's function and deter-mined that it is not required to achieve a safe shutdown of the reactor or mitigate the consequences of an analyzed accident.

CH-208: Reactor Coolant Pump Controlled Bleedoff Heater Relief Valve -

CH-223: Intermediate Pressure Letdown Relief Valve CH-224: Low Pressure Letdown Relief Valve CH-336: Heat Traced Piping Relief Valve AC-341: Component Cooling Water Surge Tank Vent Header Relief Valve AC-4A-HX: Shutdown Cooling Heat Exchanger No. 4A Relief Valve AC-4B-HX: Shutdown Cooling Heat Exchanger No. 4B Relief Valve AC-8-HX: Storage Pool Heat Exchanger Relief Valve

10) Page 42 The Commission's letter dated June 29, 1981 granted relief from the ISI testing (i.e. , exercising) of check valves SI-159 and 160 through September 26, 1983. The ISI Program has been revised accordingly.

Attachment 2 i

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