ML20107G285

Summarizes Results of Rod Drop Testing Performed at Plant Following Unit 2 Reactor Trip on 960319,per NRC Bulletin 96-001

ML20107G285
Person / Time
Site:	Prairie Island
Issue date:	04/17/1996
From:	Wadley M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-96-001, IEB-96-1, NUDOCS 9604230169
Download: ML20107G285 (4)

Text

Northern States Power Company Pralrie Island Nuclear Generating Plant 1717 Wakonade Dr. East Welch, Minnesota 55089 April 17,1990 Bulletin 96-01 U S Nuclear Regulatory Commission 4 Attn: Document Control Desk Washington, DC 20555 1

PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos.50-282 License Nos. DPR-42 50-306 DPR-60 l

Summary Report for Prairie Island Rod Drop Data (requested by Bulletin 96-01) from Unit 2 Reactor Trio of Marech 19.1996 This letter summarizes the results of Rod Drop testing performed at Prairie Island Nuclear Generating Plant following a Unit 2 Reactor Trip which occurred on March 19, 1996. This testing was per'ormed per requested action #3 of NRC Bulletin 96-01 Control Rod Insertion Problems.

Testing was performed identically to the normal refueling test by simultaneously dropping all rods from a full out position at hot (547*F) full pressure (2235 psig) full flow (100%) condition. The results of this testing are summarized in Table 1 attached. Of the 29 rods tested the highest exposure rod was approximately 41,776 MVO/MTU All of the rods tested met the technical specification drop time requirements. No abnormalities were detected in rod drop time (rod full out to entry to dash pot region) nor in total rod drop time (full out to rod bottom). All rods experienced recoil upon rod bottom similar to normal refueling rod drop testing. In comparison of rod drop times to post refueling data no degradation in drop time nor rod recoil was evident.

The testing performed verified operability of each of the control rods and did not require any corrective actions.

In this letter we have made no new Nuclear Regulatory Commission commitments.

230007 9604230169 960417 i PDR ADOCK 05000282 I G PDft i

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USNRC NORTHERN STATES POWER COMPANY April 17,1996 l Page 2 j Please contact Jack Leveille (612-388-1121, Ext. 4662) if you have any questions related to this letter.

Afnt&Lo Michael D Wadley Plant Manager Prairie Island Nuclear Gener ting Plant c: Regional Administrator - Region 111, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg Attachments:

1. Affidavit

. 2. Table 1, Prairie Island Unit 2 Rod Drop Data from 3/19/96 Reactor Trip I

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DU9601-1. DOC l

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UNITED STATEC NUCLEAR REGULATORY COMMIS510N NORTHERN STATES POVER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT DOCKET NO. 50-282 50-306 i

BULLETIN 96-01, CONTROL ROD INSERTION PROBLEMS Northern States Power Company, a Minnesota corporation, with this letter is submitting information

. requested by NRC Bulletin 96-01.

This letter contains no restricted or other defense information.

a 4 NORTHERN STATES POWER COMPANY 4 ,

BY Michael D Wadley // l Plant Manager (/ l Prairie Island Nuclear Generating Plant On this y of ~

before me a notary public in and for said r

County, pe'rsonally appearedfichael D Wadley, l)lant Manager, Prairie Island Nuclear Generating Plant;  !

and being first duly swom acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the contents thereof, and that to the best of his

, knowledge, information, and beli f the statements made in it are true and that it is not interposed for delay.

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TABLE 1 Prairie Island Unit 2 Rod Drop Data from 3/19/96 Reactor Trip

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i, ; . [. ' r[ ,#f., "i.. d 88 10943 1278 1832 1296 1818 l H2 l 11013 l 1284 l 1808 l 1290 l 1766 l F2 l 11084 l 1262 l 1812 l 1262 l 1782 l B6 l 11091 l 1278 l 1820 l 1282 l 1780 l L8 l 11243 l 1270 l 1824 l 1274 l 1786 l L6 l 11292 l 1268 l 1814 l 1270 l 1786 l H12 l 11443 l 1278 l 1770 l 1279 l 1787 ,

l F12 l 11501 l 1294 l 1812 l 1296 l 1764 )

l E3 l 11655 l 1258 l 1812 l 1260 l 1784 l c5 l 11788 l 1270 l 1846 l 1276 l 1824 l 13 l 11820 l 1276 l 1830 l 1278 l 1798 l K5 l 11828 l 1274 l 1830 l 1274 l 1798 l K9 l 11829 l 1266 l 1808 l 1270 l 1784 l C9 l 11876 l 1264 l 1816 l 1264 l 1782 l E11 l 11924 l 1280 l 1830 l 1282 l 1802 l 111 l 11991 l 1270 l 1838 l 1272 l 1812 ,

l D4 l 34301 l 1276 l 1820 l 1284 l 1826 l D10 l 34762 l 1278 l 1802 l 1276 l 1794 l J4 l 34788 l 1296 l 1814 l 1290 l 1794 l J10 l 34899 l 1282 l 1808 l 1288 l 1808 l G3 l 35642 l 1272 l 1782 l 1258 l 1764 l K7 l 35656 l 1270 l 1778 l 1296 l 1790 l c7 l 35677 l 1284 l 1770 l 1268 l 1750 l G11 l 36395 l 1262 l 1764 l 1252 l 1746 l H8 l 37372 l 1278 l 1796 l 1278 l 1784 l F8 l 37392 l 1280 l 1776 l 1282 l 1766 l H6 l 37763 l 1284 l 1838 l 1290 l 1828 l F6 l 37828 l 1280 l 1802 l 1282 l 1788

@_ _ ;7 l 41776 l 1290 l 1782 l 1298 l 1770

• Drop Time is required to be less than 1800 msec per Prairie Island Technical Specification 3.10.H.