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290    APPENDIX E Frequency response analysis of linear systems





                           Example E.4—Cont’d

                                     10 1 0



                                     10
                                    POWER SPECTRUM (1/Hz)  10 –1  PEAK FREQUENCY




                                          –0.38 Hz.

                                      –2
                                     10


                                     10 –3
                                       0.01          0.1           1.0           10
                                                        FREQUENCY (Hz)

                                     10 1 0


                                    POWER SPECTRUM (1/Hz)  10 –1  PEAK FREQUENCY
                                     10




                                          –0.35 Hz.

                                      –2
                                     10


                                     10 –3
                                       0.01          0.1           1.0           10
                                                        FREQUENCY (Hz)
                           FIG. E.7
                           Frequency response functions calculated using measurements from Average Power
                           Range Monitor (APRM) detectors in two different BWRs. The maximum or peak
                           frequencies are approximately equal to 0.40 and 0.35Hz.
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