05000263/LER-2011-005, Regarding Power Range Monitor Channels Out of Alignment

Regarding Power Range Monitor Channels Out of Alignment

ML112380765
Person / Time
Site:	Monticello
Issue date:	08/26/2011
From:	O'Connor T Northern States Power Co, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-MT-11-051 LER 11-005-00
Download: ML112380765 (4)

LER-2011-005, Regarding Power Range Monitor Channels Out of Alignment

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
2632011005R00 - NRC Website

text

'@ Xcel Energye August 26,201 1 Monticello Nuclear Generating Plant 2807 W County Road 75 Monticello, MN 55362 L-MT-11-05 1 10 CFR 50.73 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket No. 50-263 Renewed Facility Operating License No. DPR-22 LER 201 1-005, "Power Ranae Monitor Channels Out of Alinnment" The Licensee Event Report (LER) for this occurrence is attached.

Summaw of Commitments and no revisions to existing commitments.

Plant Enclosure cc:

Administrator, Region Ill, USNRC Project Manager, Monticello, USNRC Resident Inspector, Monticello, USNRC

ANRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (1 0-201 0)

LICENSEE EVENT REPORT (LER)

(See reverse for re uired number of digits/characters?or each block)

1. FACILITY NAME Monticello Nuclear Generating Plant APPROVED BY OMB NO. 3150-0104 EXPIRES 1013112013

, the RRC m?y not conduct or sponsor, and a person IS not requlred to respond to, the lnformatlon collectlon.

2. DOCKET NUMBER 05000 263

4. TITLt Power Range Monitor Channels Out of Alignment

3. PAGE 1 of 3

5. EVENT DATE MONTH 06

6. LER NUMBER I

I

12. LICENSEE CONTACT FOR THlS LER FACILITY NAME TELtPHONE NU f v

i E

p

11. THlS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR 5: (Check all that apply)

C] 20.2201(b)

C] 20.2203(a)(3)(i)

C] 50.73(a)(2)(i)(C)

C] 50.73(a)(2)(vii) 20.2201 (d)

C] 20.2203(a)(3)(ii)

C] 50.73(a)(2)(ii)(A)

C] 50.73(a)(2)(viii)(A)

C] 20.2203(a)(I)

C] 20.2203(a)(4)

C] 50,73(a)(2)(ii)(B)

C] 50,73(a)(2)(viii)(B)

C] 20.2203(a)(2)(i)

C] 50.36(c)(l)(i)(A)

C] 50,73(a)(2)(iii)

C] 50,73(a)(2)(ix)(A)

C] 20.2203(a)(2)(ii)

C] 50,36(c)(l)(ii)(A)

[XI 50.73(a)(2)(iv)(A)

C] 50.73(a)(2)(x)

C] 20.2203(a)(2)(iii)

C] 50.36(~)(2)

C] 50,73(a)(2)(v)(A)

C] 73.71 (a)(4)

C] 20.2203(a)(2)(iv)

C] 50,46(a)(3)(ii)

C] 50.73(a)(2)(v)(B)

C] 73.71 (a)@)

C] 20.2203(a)(2)(v)

C] 50,73(a)(2)(i)(A) 50.73(a)(2)(v)(~)

C] OTHER S eci in Abstract below or in C] 20.2203(a)(2)(vi)

C] 50.73(a)(2)(i)(B)

[XI 50.73(a)(2)(v)(D)

N ~ C (10-2010)

1 CORRECTIVE ACTIONS

An interim corrective action includes revising reactivity management procedures to include guidance for monitoring and adjusting gains on APRM's prior to each reactivity maneuvering step which could challenge the +I-2% criteria. Additional actions will be implemented based on the results of the causal evaluation.

LICENSEE EVENT REPORT (LER)

CONTINUATION SHEET

PREVIOUS SIMILAR EVENTS

U.S. NUCLEAR REGULATORY COMMISSION On November 4, 2010 all four APRM channels failed to meet the +I-2% tolerance with respect to RTP following isolation of the 15B feedwater heater for repair (LER 201 0-005).

1. FACILITY NAME Monticello Nuclear Generating Plant 2. DOCKET 05000 263

3. PAGE 3 o f 3

6. LER NUMBER YEAR SEQUENTIAL NUMBER REV NO